task: Remote feature flag gates GutenbergKit plugins

[dcalhoun]

Allow remotely controlling the availability of GutenbergKit plugin
support. Ref CMM-277.

Related:

• CMM-277-linear-issue
• 180578-ghe-Automattic/wpcom
• task: Remote feature flag gates GutenbergKit plugins WordPress-iOS#24449

To Test:

1. Enable the Experimental block editor feature flag.
2. Open the editor for a WordPress.com-hosted site.
3. Verify the expected presence of third-party blocks based on whether the
   logged in user account is an A11n or non-A11n.

Regression Notes

1. Potential unintended areas of impact
   Unlikely for this feature flag change for an experimental feature.
2. What I did to test those areas of impact (or what existing automated tests I relied on)
   N/A.
3. What automated tests I added (or what prevented me from doing so)
   Deemed unnecessary for the experimental feature.

PR Submission Checklist:

• I have completed the Regression Notes.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

Testing Checklist (strike-out the not-applying and unnecessary ones):

• WordPress.com sites and self-hosted Jetpack sites.
• Portrait and landscape orientations.
• Light and dark modes.
• Fonts: Larger, smaller and bold text.
• High contrast.
• Talkback.
• Languages with large words or with letters/accents not frequently used in English.
• Right-to-left languages. (Even if translation isn’t complete, formatting should still respect the right-to-left layout)
• Large and small screen sizes. (Tablet and smaller phones)
• Multi-tasking: Split screen and Pop-up view. (Android 10 or higher)

[dangermattic]

	2 Warnings
⚠️	Class GutenbergKitPluginsFeature is missing tests, but unit-tests-exemption label was set to ignore this.
⚠️	PR is not assigned to a milestone.

Generated by 🚫 Danger

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[wpmobilebot]

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

	App Name	WordPress
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr21806-4684ac7
	Commit	4684ac7
	Direct Download	wordpress-prototype-build-pr21806-4684ac7.apk

Note: Google Login is not supported on these builds.

[wpmobilebot]

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

	App Name	Jetpack
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr21806-4684ac7
	Commit	4684ac7
	Direct Download	jetpack-prototype-build-pr21806-4684ac7.apk

Note: Google Login is not supported on these builds.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 39.32%. Comparing base (64f0cea) to head (4684ac7).
Report is 2 commits behind head on trunk.

Additional details and impacted files

@@           Coverage Diff           @@
##            trunk   #21806   +/-   ##
=======================================
  Coverage   39.32%   39.32%           
=======================================
  Files        2125     2125           
  Lines       99871    99871           
  Branches    15385    15385           
=======================================
  Hits        39277    39277           
  Misses      57114    57114           
  Partials     3480     3480           

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[dcalhoun]

The associated server code is now deployed, so testing this no longer requires sandbox setup. I removed that note from the PR description.

[Copilot]

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (1)

WordPress/src/main/java/org/wordpress/android/ui/posts/EditPostActivity.kt:2523

• Ensure that automated tests adequately cover the behavior of the new remote feature flag used here for enabling/disabling GutenbergKit plugins.

"plugins" to (gutenbergKitPluginsFeature.isEnabled() && site.isWPCom),

[nbradbury]

@dcalhoun I need to verify the testing steps. If I'm logged into the app with an Automattic account, and I have "Experimental block editor" enabled, then if I have a plugin that adds third party blocks, typing / in the editor should show those third party blocks?

[dcalhoun]

@nbradbury currently, this only supports WordPress.com-provided blocks on Simple sites—e.g., Jetpack AI, Tiled Gallery, Image Compare. Atomic and self-hosted, Jetpack-connected sites are not supported. Block types provided by other third-party plugins are not supported.

Apologies for not communicating that more clearly.

[nbradbury]