Update the implementation and androidTestImplementation dependencies
following the latest androidx.core and androidx.activity releases.

Bug: 462178249
Test: existing test suites pass
Relnote: N/A
Change-Id: I2efdbb0c3fb92c96df6e7f2ec063d39d9a363853

Updates RuntimeUtilsTest.java to align with the stricter null-safety contract
introduced in com.android.extensions.xr.node.InputEvent.HitInfo.

The HitInfo class now strictly enforces NonNull for its parameters,
meaning test cases attempting to pass null to these parameters are no longer valid and will throw.

Specifically:
- Removed getHitInfo_nullInputNode_returnsNull: Not applicable as inputNode in HitInfo is always NonNull.
- Removed getHitInfo_nullTransform_returnsNull: Not applicable as transform in HitInfo is always NonNull.
- Removed getHitInfo_nullHitEntity_returnsNull: getHitInfo_unKnownNode_returnsNull already cover this case
                                                if I take an unknow node into HitInfo of XrExtensions.

Bug: 475709106
Test: Presubmit

Change-Id: Icffbda4ceb544dd6964ad538c3537a7ce7e28830

Relnote: "Add a boolean flag to PaneScaffoldDirective to opt out the
  behavior that automactically moves the focus to the current
  destination pane."

Test: manual
Bug: 445720462
Change-Id: I929f5960c59f10a82b53d701eaf757da9e20f9e2

Change-Id: I5d6ab48d7db2320710401393648096ca31351376

This refactoring moves the gapbuffer specific change list implementation
to the gapbuffer package.

This is a step in a larger refactoring that will eventually allow a
new composer implementation, based on a link buffer instead of a gap
buffer, to land behind a flag.

Test: N/A - refactor
Relnote: N/A
Bug: 268366116
Change-Id: Icab1f6421c1bf1d9b2615492912e76c1f03e5bb6

…o androidx-main

Bug: 474095550
Test: Presubmit
Relnote: n/a
Change-Id: I9fba6e9e2b1d748b68e2617c192dad2a3d13d225

…in sync with the version being provisioned by Benchmark.

* The app expected `1.0.0`, but benchmark provided `1.0.1`.
* This situation should get better once we switch to using Tracing 2.0.0.

Test: TrivialPerfettoSdkBenchmark now passes.
Fixes: 464447859
Change-Id: Id8543b170b5c41e118f26f5fa903502be48dcaa1

* This is not safe to do given we might end up dropping a trace packet when ending a trace section.
* We fallback to allocations here to gracefully recover.

Test: Ignored the dropped event tests. All other unit tests pass.
Change-Id: Iefa0cebf7d2ad34d02ba53881da48b4d80e5d9fa

Change-Id: I299590bde7e22c144abb79eb2f6377488df3cf53

…racing in sync with the version being provisioned by Benchmark." into androidx-main

…migration

This commit updates XrExtensions' object comparison logic following the
package name migration.

Due to `com.android.extensions.xr.*` objects now acting as wrappers for
`android.extensions.xr.*` objects, `isSameInstanceAs` is no longer
reliable. Two distinct wrapper instances can represent the same underlying
object.

Comparison must now use `isEqualTo` (which calls the wrapped object's
`equals()` method) to correctly determine if two wrapper objects refer to the same underlying entity.

Bug: 475752776
Test: Presubmit

Change-Id: Ia258fb005d494941227beadaa100d65d4b3ab1a5

…ackage migration" into androidx-main

…nsionsWrapperImplTest.

Fixed an issue where mBuilder was not initialized, causing it to be null.
This was discovered after a test case threw a null exception following an update to the XrExtensions fake runtime.

Bug: 475746834
Test: Presubmit

Change-Id: Ia60f31cea551f6c23ec798ae7895db1f459fb7f5

…ackExtensionsWrapperImplTest." into androidx-main

…ontract" into androidx-main