Refactor PomValidator

[daymxn]

Per b/279212956,

This takes advantage of the new extension methods provided in the recently merged #4879, and refactors the PomValidator task to take advantage of them.

Additionally, this fixes b/279212781 - providing documentation for the PomValidator task.

[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.

[github-actions]

buildSrc Test Results

26 tests   26 ✔️  1m 37s ⏱️
  5 suites    0 💤
  5 files      0 ❌

Results for commit 925ad77.

♻️ This comment has been updated with latest results.

[github-actions]

Unit Test Results

   763 files  +   735     763 suites  +735   32m 14s ⏱️ + 31m 42s
4 865 tests +4 754  4 843 ✔️ +4 732  21 💤 +21  1 ❌ +1 
9 168 runs  +8 946  9 125 ✔️ +8 903  42 💤 +42  1 ❌ +1 

For more details on these failures, see this check.

Results for commit 925ad77. ± Comparison against base commit 7509feb.

♻️ This comment has been updated with latest results.

[google-oss-bot]

Size Report ¹

Affected Products

No changes between base commit (7509feb) and merge commit (a0c0cc3).

Test Logs

• Base (7509feb): https://github.com/firebase/firebase-android-sdk/actions/runs/4789958395
• Merge (a0c0cc3): https://github.com/firebase/firebase-android-sdk/actions/runs/4790423223

1. https://storage.googleapis.com/firebase-sdk-metric-reports/DGB9UJSMyv.html

[google-oss-bot]

Startup Time Report ¹

The report is too large (117,075 chars) to be displayed on GitHub. Please check this report on GCS.

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

[google-oss-bot]

Coverage Report ¹

Affected Products

• firebase-database

  Overall coverage changed from 50.19% (7509feb) to 50.18% (a0c0cc3) by -0.01%.

  Filename	Base (7509feb)	Merge (a0c0cc3)	Diff
  DefaultPersistenceManager.java	75.73%	74.76%	-0.97%

• firebase-firestore

  Overall coverage changed from 44.14% (7509feb) to 44.14% (a0c0cc3) by -0.00%.

  Filename	Base (7509feb)	Merge (a0c0cc3)	Diff
  DeleteMutation.java	95.24%	90.48%	-4.76%

• firebase-messaging

  Overall coverage changed from 85.18% (7509feb) to 85.22% (a0c0cc3) by +0.04%.

  Filename	Base (7509feb)	Merge (a0c0cc3)	Diff
  FirebaseMessaging.java	77.09%	76.21%	-0.88%
  MessagingAnalytics.java	81.38%	81.78%	+0.40%
  RequestDeduplicator.java	80.00%	90.00%	+10.00%

• firebase-storage

  Overall coverage changed from 85.90% (7509feb) to 86.21% (a0c0cc3) by +0.30%.

  Filename	Base (7509feb)	Merge (a0c0cc3)	Diff
  StorageException.java	65.45%	69.09%	+3.64%
  StorageTask.java	83.69%	83.99%	+0.30%
  UploadTask.java	81.79%	83.11%	+1.32%

Test Logs

• Base (7509feb): https://github.com/firebase/firebase-android-sdk/actions/runs/4789958395
• Merge (a0c0cc3): https://github.com/firebase/firebase-android-sdk/actions/runs/4790423223

1. https://storage.googleapis.com/firebase-sdk-metric-reports/oJ0v57UdjL.html