[Firebase AI] Fix goldenDevAPIStreamingFile util

[andrewheard]

The goldenDevAPIStreamingFile was returning golden files for Vertex AI. Switching this to Google AI should result in the prompt blocked for safety test failing since the Google AI version of streaming-failure-prompt-blocked-safety.txt does not contain a blocked prompt response.

[github-actions]

📝 PRs merging into main branch

Our main branch should always be in a releasable state. If you are working on a larger change, or if you don't want this change to see the light of the day just yet, consider using a feature branch first, and only merge into the main branch when the code complete and ready to be released.

[google-oss-bot]

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Coverage Report ¹

Affected Products

No changes between base commit (a6010b2) and merge commit (0255772).

Test Logs

• Base (a6010b2): https://github.com/firebase/firebase-android-sdk/actions/runs/14740405966
• Merge (0255772): https://github.com/firebase/firebase-android-sdk/actions/runs/14742304409

1. https://storage.googleapis.com/firebase-sdk-metric-reports/Ugtnylw4Da.html

[github-actions]

Test Results

 29 files   -  1 008   29 suites   - 1 008   21s ⏱️ - 33m 57s
184 tests  -  5 788  181 ✅  -  5 768  0 💤  - 22  3 ❌ +2 
270 runs   - 11 413  267 ✅  - 11 371  0 💤  - 44  3 ❌ +2 

For more details on these failures, see this check.

Results for commit 3c5f29f. ± Comparison against base commit a6010b2.

This pull request removes 5788 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
…

[andrewheard]

@davidmotson Would you mind taking over this PR?

[google-oss-bot]

Size Report ¹

Affected Products

No changes between base commit (a6010b2) and merge commit (0255772).

Test Logs

• Base (a6010b2): https://github.com/firebase/firebase-android-sdk/actions/runs/14740405966
• Merge (0255772): https://github.com/firebase/firebase-android-sdk/actions/runs/14742304409

1. https://storage.googleapis.com/firebase-sdk-metric-reports/W8nuuj8UWU.html

[andrewheard]

Closing in favour of #6932.