Update changelogs for m150

[daymxn]

This updates the changelog entries that had their contents changed in the m150 CL.

NO_RELEASE_CHANGE

[github-actions]

Release note changes

The following release notes were modified. Please ensure they look correct.

Release Notes

firebase-firestore

### {{firestore}} version 25.1.2 {: #firestore_v25-1-2}

* {{fixed}} Fixed a server and SDK mismatch in unicode string sorting. GitHub [#6615](//github.com/firebase/firebase-android-sdk/issues/6615){: .external}

#### {{firestore}} Kotlin extensions version 25.1.2 {: #firestore-ktx_v25-1-2}

The Kotlin extensions library transitively includes the updated
`firebase-firestore` library. The Kotlin extensions library has no additional
updates.

firebase-vertexai

### {{firebase_vertexai}} version 16.1.0 {: #vertex-ai_v16-1-0}

* {{changed}} Internal improvements to correctly handle empty responses from models.

[github-actions]

Vertex AI Mock Responses Check ⚠️

A newer major version of the mock responses for Vertex AI unit tests is available. update_responses.sh should be updated to clone the latest version of the responses: v6.1

[google-oss-bot]

Coverage Report ¹

Affected Products

• firebase-firestore

  Overall coverage changed from 45.74% (9a1550f) to 45.73% (5831e0e) by -0.01%.

  Filename	Base (9a1550f)	Merge (5831e0e)	Diff
  LruGarbageCollector.java	97.27%	93.64%	-3.64%
  PatchMutation.java	98.39%	100.00%	+1.61%
  SetMutation.java	94.44%	97.22%	+2.78%

Test Logs

• Base (9a1550f): https://github.com/firebase/firebase-android-sdk/actions/runs/13118862069
• Merge (5831e0e): https://github.com/firebase/firebase-android-sdk/actions/runs/13145876032

1. https://storage.googleapis.com/firebase-sdk-metric-reports/Zlieb9Gxkz.html

[github-actions]

Test Results

  206 files   -   828    206 suites   - 828   5m 13s ⏱️ - 29m 15s
1 347 tests  - 4 541  1 331 ✅  - 4 535  16 💤  -  6  0 ❌ ±0 
2 718 runs   - 9 121  2 686 ✅  - 9 109  32 💤  - 12  0 ❌ ±0 

Results for commit dc5517a. ± Comparison against base commit 9a1550f.

This pull request removes 4541 tests.

com.google.android.datatransport.cct.CctBackendFactoryTest ‑ create_returnCCTBackend_WhenBackendNameIsCCT
com.google.android.datatransport.cct.CctDestinationTest ‑ cctDestination_shouldOnlySupportProtoAndJson
com.google.android.datatransport.cct.CctDestinationTest ‑ cctDestination_shouldSupportProtoAndJson
com.google.android.datatransport.cct.CctTransportBackendTest ‑ decorate_whenOffline_shouldProperlyPopulateNetworkInfo
com.google.android.datatransport.cct.CctTransportBackendTest ‑ decorate_whenOnline_shouldProperlyPopulateNetworkInfo
com.google.android.datatransport.cct.CctTransportBackendTest ‑ schedule_shouldAddCookieOnPseudonymousIds
com.google.android.datatransport.cct.CctTransportBackendTest ‑ schedule_shouldDropCookieOnMixedPseudonymousIds
com.google.android.datatransport.cct.CctTransportBackendTest ‑ send_CompressedResponseIsUncompressed
com.google.android.datatransport.cct.CctTransportBackendTest ‑ send_whenBackendRedirectsMoreThan5Times_shouldOnlyRedirect4Times
com.google.android.datatransport.cct.CctTransportBackendTest ‑ send_whenBackendRedirects_shouldCorrectlyFollowTheRedirectViaPost
…

[google-oss-bot]

Size Report ¹

Affected Products

No changes between base commit (9a1550f) and merge commit (5831e0e).

Test Logs

• Base (9a1550f): https://github.com/firebase/firebase-android-sdk/actions/runs/13118862069
• Merge (5831e0e): https://github.com/firebase/firebase-android-sdk/actions/runs/13145876032

1. https://storage.googleapis.com/firebase-sdk-metric-reports/AaxzbuX19x.html

[rlazo]

m159?