dataconnect: demo: add "Delete" button an "List Items" screen.

[dconeybe]

No description provided.

[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: v5.2

[github-actions]

Release note changes

No release note changes were detected. If you made changes that should be
present in the next release, ensure you've added an entry in the appropriate
CHANGELOG.md file(s).

[google-oss-bot]

Coverage Report ¹

Affected Products

No changes between base commit (b164139) and merge commit (140906a).

Test Logs

• Base (b164139): https://github.com/firebase/firebase-android-sdk/actions/runs/12243822424
• Merge (140906a): https://github.com/firebase/firebase-android-sdk/actions/runs/12245694678

1. https://storage.googleapis.com/firebase-sdk-metric-reports/Qp8EdGipBm.html

[github-actions]

Test Results

   62 files   -    974     62 suites   - 974   1m 15s ⏱️ - 31m 59s
  541 tests  -  5 332    540 ✅  -  5 311  1 💤  - 21  0 ❌ ±0 
1 082 runs   - 10 749  1 080 ✅  - 10 707  2 💤  - 42  0 ❌ ±0 

Results for commit 7146350. ± Comparison against base commit b164139.

This pull request removes 5332 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 (b164139) and merge commit (140906a).

Test Logs

• Base (b164139): https://github.com/firebase/firebase-android-sdk/actions/runs/12243822424
• Merge (140906a): https://github.com/firebase/firebase-android-sdk/actions/runs/12245694678

1. https://storage.googleapis.com/firebase-sdk-metric-reports/evKI1aFzZM.html