feat: Implement LatestContentProvider for WebView recovery

[dcalhoun]

Description

Ref CMM-1123.

This is a rebased version of #22493 (which was tested and approved). This now targets the jkmassel/gutenbergkit-settings-refactor branch (#22764) so it can be reviewed/tested on top of the GutenbergKit v0.15.0 upgrade.

Implements GutenbergKit's LatestContentProvider interface for pull-based content recovery.

When the WebView reinitializes (due to OS memory pressure or page refresh), the editor now requests the latest content from the app rather than using stale content from the initial WebView load. This ensures users don't lose their work during WebView recovery.

Changes:

• Added getPersistedTitle() and getPersistedContent() methods to EditorFragmentListener interface
• Set up LatestContentProvider on GutenbergView in GutenbergKitEditorFragment
• Implemented the interface methods in GutenbergKitActivity returning content from EditPostRepository
• Properly set the post status to avoid unexpectedly emptying post titles

Rebase notes:

• Dropped 3 obsolete GutenbergKit version-bump commits (target branch already updates to v0.15.0)
• Dropped the warmup-helper fix commit (warmup is a no-op stub on the new branch pending re-implementation against the v0.15.0 API)
• Adapted EditorConfigurationBuilder to the new builder API: setStatus(...) → setPostStatus(...) and removed the now-redundant setPostType(...) call (postType is a constructor argument)

Related PRs:

• Original PR: feat: Implement LatestContentProvider for WebView recovery #22493
• Base PR: Upgrade GutenbergKit from v0.11.1 to v0.15.0 #22764
• GutenbergKit: feat: Recover content on WebView refresh via pull model GutenbergKit#283
• WordPress-iOS: feat: Implement editorRequestsLatestContent for WebView recovery WordPress-iOS#25144

Testing instructions

WebView refresh recovery:

1. Open a post with existing content in the GutenbergKit editor
2. Make edits to the content (wait 2+ seconds for autosave to persist)
3. Trigger a WebView refresh: press Cmd+R while the WebView is inspected via the Chrome Inspector at chrome://inspect

• Verify the editor recovers with the edited content, not the original

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack Android by scanning the QR code below to install the corresponding build.

	App Name	Jetpack Android
	Build Type	Debug
	Version	pr22774-700d23b
	Build Number	1488
	Application ID	com.jetpack.android.prealpha
	Commit	700d23b
	Installation URL	4hkvmjvqrv1pg

Automatticians: You can use our internal self-serve MC tool to give yourself access to those builds if needed.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress Android by scanning the QR code below to install the corresponding build.

	App Name	WordPress Android
	Build Type	Debug
	Version	pr22774-700d23b
	Build Number	1488
	Application ID	org.wordpress.android.prealpha
	Commit	700d23b
	Installation URL	7v15g0tt64pp0

Automatticians: You can use our internal self-serve MC tool to give yourself access to those builds if needed.

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 37.40%. Comparing base (6cfa2a2) to head (700d23b).
⚠️ Report is 1 commits behind head on jkmassel/gutenbergkit-settings-refactor.

Files with missing lines	Patch %	Lines
...ss/android/ui/posts/GutenbergKitSettingsBuilder.kt	60.00%	2 Missing ⚠️
...ess/android/ui/posts/EditorConfigurationBuilder.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@                           Coverage Diff                            @@
##           jkmassel/gutenbergkit-settings-refactor   #22774   +/-   ##
========================================================================
  Coverage                                    37.40%   37.40%           
========================================================================
  Files                                         2320     2320           
  Lines                                       123654   123658    +4     
  Branches                                     16793    16795    +2     
========================================================================
+ Hits                                         46256    46258    +2     
- Misses                                       73687    73689    +2     
  Partials                                      3711     3711           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[dcalhoun]

This integrates the bug fix from wordpress-mobile/GutenbergKit#432, which is required for testing the LatestContentProvider's ability to preserve content persistence through WebView reloads.

Once wordpress-mobile/GutenbergKit#432 merges, this should be updated to point to a new release containing that fix.

[wpmobilebot]

Project dependencies changes

list

! Upgraded Dependencies
org.wordpress.gutenbergkit:android:432-944fbfce704642cfe725dc69c03b3cf6d5018854, (changed from v0.15.0)

tree

 +--- project :libs:editor
-|    \--- org.wordpress.gutenbergkit:android:v0.15.0
+|    \--- org.wordpress.gutenbergkit:android:432-944fbfce704642cfe725dc69c03b3cf6d5018854
-\--- org.wordpress.gutenbergkit:android:v0.15.0 (*)
+\--- org.wordpress.gutenbergkit:android:432-944fbfce704642cfe725dc69c03b3cf6d5018854 (*)

[jkmassel]

Tested on-device, no data loss

[jkmassel]

Because this is a Java file, we should have @ NonNull for this (and getPersistedContent)