deps: update grpc dependencies to v1.68.1 (#3240)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [io.grpc:grpc-core](https://redirect.github.com/grpc/grpc-java) |
`1.67.1` -> `1.68.1` |
[![age](https://developer.mend.io/api/mc/badges/age/maven/io.grpc:grpc-core/1.68.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/io.grpc:grpc-core/1.68.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/io.grpc:grpc-core/1.67.1/1.68.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/io.grpc:grpc-core/1.67.1/1.68.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
| [io.grpc:grpc-bom](https://redirect.github.com/grpc/grpc-java) |
`1.67.1` -> `1.68.1` |
[![age](https://developer.mend.io/api/mc/badges/age/maven/io.grpc:grpc-bom/1.68.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/io.grpc:grpc-bom/1.68.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/io.grpc:grpc-bom/1.67.1/1.68.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/io.grpc:grpc-bom/1.67.1/1.68.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

---

### Release Notes

<details>
<summary>grpc/grpc-java (io.grpc:grpc-core)</summary>

###
[`v1.68.1`](https://redirect.github.com/grpc/grpc-java/releases/tag/v1.68.1)

##### gRPC Java 1.68.1 Release Notes

v1.68.0 was a mistake. This is the first release of version 1.68.x

##### Bug Fixes

- xds: Fix NullPointerException introduced in "Fix load reporting when
pick first is used for locality-routing"
([#&#8203;11553](https://redirect.github.com/grpc/grpc-java/issues/11553)).
This was in 1.67.1 but not 1.68.0

##### Behavior Changes

- core: JSON parsing rejects duplicate keys in objects
([#&#8203;11575](https://redirect.github.com/grpc/grpc-java/issues/11575))
([`4be69e3`](https://redirect.github.com/grpc/grpc-java/commit/4be69e3f8)).
This is the existing behavior in C core. Duplicate keys in objects are
dangerous as which value takes effect is undefined. Previously, the last
value was used
- okhttp: Detect transport executors with no remaining threads
([#&#8203;11503](https://redirect.github.com/grpc/grpc-java/issues/11503))
([`3a6be9c`](https://redirect.github.com/grpc/grpc-java/commit/3a6be9ca1)).
The transport uses two threads, but one is on-demand. If the executor
provided to `builder.transportExecutor()` runs out of threads (e.g., it
is a fixed-size thread pool), *all* transports can be wedged, unable to
run on-demand tasks, until keepalive kills one of them. Two threads are
now used when handshaking a new transport, and the transport will time
out after 1 second with “Timed out waiting for second handshake thread”
if two threads are unavailable
- gcp-csm-o11y: Get `mesh_id` value from `CSM_MESH_ID` environment
variable, instead of getting it from bootstrap file
([`84d30af`](https://redirect.github.com/grpc/grpc-java/commit/84d30afad))

##### Improvements

- New grpc-context-override-opentelemetry artifact
([#&#8203;11523](https://redirect.github.com/grpc/grpc-java/issues/11523))
([`782a44a`](https://redirect.github.com/grpc/grpc-java/commit/782a44ad6))
([#&#8203;11599](https://redirect.github.com/grpc/grpc-java/issues/11599))
([`e59ae5f`](https://redirect.github.com/grpc/grpc-java/commit/e59ae5fad)).
This is a `io.grpc.Context` storage override to store its state in
`io.opentelemetry.context.Context`. Libraries should not add a
dependency on this artifact, as applications can only have one storage
override in their classpath
- New grpc-s2a artifact. It is a transport that offloads the handshake
similar to ALTS, but for TLS. It provides
`io.grpc.s2a.S2AChannelCredentials`
- api: Enhance name resolver \`ResolutionResult\` to hold addresses or
error so the single listener API *onResult2* is used to convey both
success and error cases for name resolution
([#&#8203;11330](https://redirect.github.com/grpc/grpc-java/issues/11330))
([`1ded8af`](https://redirect.github.com/grpc/grpc-java/commit/1ded8aff8))
- core: Handle NameResolver/LoadBalancer exceptions when panicking
([`b692b9d`](https://redirect.github.com/grpc/grpc-java/commit/b692b9d26)).
This expands the class of bugs that will fail RPCs with the panic error,
versus some undefined behavior
- core: Use the default service config in case of initial name resolver
address resolution error
([#&#8203;11577](https://redirect.github.com/grpc/grpc-java/issues/11577))
([`fa26a8b`](https://redirect.github.com/grpc/grpc-java/commit/fa26a8bc5))
- core: `StreamTracer.inboundMessageRead()` now reports uncompressed
message size when the message does not need compression
([#&#8203;11598](https://redirect.github.com/grpc/grpc-java/issues/11598))
([`2aae68e`](https://redirect.github.com/grpc/grpc-java/commit/2aae68e11)).
Previously it always reported `-1` (unknown)
- netty: Avoid TCP_USER_TIMEOUT warning when explicitly specifying a
non-epoll channel type to use
([#&#8203;11564](https://redirect.github.com/grpc/grpc-java/issues/11564))
([`62f4098`](https://redirect.github.com/grpc/grpc-java/commit/62f409810))
- okhttp: Don't warn about missing Conscrypt
([`6f35422`](https://redirect.github.com/grpc/grpc-java/commit/6f3542297)).
This is especially helpful when using TLS but not running on Android
- android: For `UdsChannelBuilder`, use fake IP instead of localhost
([`a908b5e`](https://redirect.github.com/grpc/grpc-java/commit/a908b5e40)).
This avoids an unnecessary DNS lookup
- xds: Add xDS node ID in select control plane errors to enable
cross-referencing with control plane logs when debugging
([`f3cf7c3`](https://redirect.github.com/grpc/grpc-java/commit/f3cf7c3c7))
- xds: Enhanced how ADS stream terminations are handled, specifically
addressing cases where a response has or hasn't been received
(#&#8203;2e9c3e19f)
- binder: Update status code documentation for Android 11's package
visibility rules.
([#&#8203;11551](https://redirect.github.com/grpc/grpc-java/issues/11551))
([`99be6e9`](https://redirect.github.com/grpc/grpc-java/commit/99be6e985))
- binder: Update binderDied() error description to spell out the
possibilities for those unfamiliar with Android internals.
([#&#8203;11628](https://redirect.github.com/grpc/grpc-java/issues/11628))
([`46c1b38`](https://redirect.github.com/grpc/grpc-java/commit/46c1b387f))
- example-gauth: Use application default creds instead of file argument
([#&#8203;11595](https://redirect.github.com/grpc/grpc-java/issues/11595))
([`94a0a0d`](https://redirect.github.com/grpc/grpc-java/commit/94a0a0d1c))

##### Dependencies

- Updated protobuf-java to 3.25.5. This helps avoid CVE-2024-7254
([`2ff837a`](https://redirect.github.com/grpc/grpc-java/commit/2ff837ab6))

Thanks to:\
[@&#8203;Juneezee](https://redirect.github.com/Juneezee)\
[@&#8203;lgalfaso](https://redirect.github.com/lgalfaso)\
[@&#8203;bestbeforetoday](https://redirect.github.com/bestbeforetoday)\
[@&#8203;hlx502](https://redirect.github.com/hlx502)\
[@&#8203;JoeCqupt](https://redirect.github.com/JoeCqupt)

###
[`v1.68.0`](https://redirect.github.com/grpc/grpc-java/releases/tag/v1.68.0):
MISTAKE

This was supposed to be v1.67.0, but there was a mistake during the
release process. This has everything in v1.67.1, *except* for:

- xds: Fix NullPointerException introduced in "Fix load reporting when
pick first is used for locality-routing"
([https://github.com/grpc/grpc-java/pull/11553](https://redirect.github.com/grpc/grpc-java/pull/11553))

</details>

---

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Diff for: .cloudbuild/library_generation/library_generation.Dockerfile

@@ -56,7 +56,7 @@ FROM docker.io/library/python@sha256:38e179a0f0436c97ecc76bcd378d7293ab3ee79e4b8
 
 ARG OWLBOT_CLI_COMMITTISH=38fe6f89a2339ee75c77739b31b371f601b01bb3
 ARG PROTOC_VERSION=25.5
-ARG GRPC_VERSION=1.67.1
+ARG GRPC_VERSION=1.68.1
 ARG JAVA_FORMAT_VERSION=1.7
 ENV HOME=/home
 ENV OS_ARCHITECTURE="linux-x86_64"

Diff for: gapic-generator-java-pom-parent/pom.xml

@@ -26,7 +26,7 @@
     <!-- External dependencies, especially gRPC and Protobuf version, should be
         consistent across modules in this repository -->
     <javax.annotation-api.version>1.3.2</javax.annotation-api.version>
-    <grpc.version>1.67.1</grpc.version>
+    <grpc.version>1.68.1</grpc.version>
     <google.auth.version>1.29.0</google.auth.version>
     <google.http-client.version>1.45.0</google.http-client.version>
     <gson.version>2.11.0</gson.version>

Diff for: gax-java/dependencies.properties

@@ -28,7 +28,7 @@ version.gax_httpjson=2.57.1-SNAPSHOT
 
 version.com_google_protobuf=3.25.5
 version.google_java_format=1.15.0
-version.io_grpc=1.67.1
+version.io_grpc=1.68.1
 
 # Maven artifacts.
 # Note, the actual name of each property matters (bazel build scripts depend on it).