Fix the blocking issue in main thread in the Notifications tab

[jarvislin]

Fixes #20196

When I was profiling the threads, I found the main thread spent much time rendering the layouts. It continues re-rendering the UI even though the new data is the same as the old data.

This PR contains:

1. Stop updating our UI if the data is not changed so it uses DiffUtil for resolving the issue.
2. Reduce the API requests for each tab. Only the first tab can fetch remote data when the view of fragment is created.
3. Refactors

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To Test:

1. Open the Jetpack app and switch to the notifications tab.
2. Change the tab to ALL/UNREAD/COMMENT...etc
3. Scroll the notifications list
4. Click the Like inline actions
5. The Like state should be correct
6. Done! Thank you!

P.S. We still have issues in main thread, but it is smoother than the original implementation.

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Regression Notes

1. Potential unintended areas of impact

   • Notifications tab

2. What I did to test those areas of impact (or what existing automated tests I relied on)

   • Manual

3. What automated tests I added (or what prevented me from doing so)

   • None

---

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:

• 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)

[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	pr20197-75b431d
	Commit	75b431d
	Direct Download	wordpress-prototype-build-pr20197-75b431d.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	pr20197-75b431d
	Commit	75b431d
	Direct Download	jetpack-prototype-build-pr20197-75b431d.apk

Note: Google Login is not supported on these builds.

[codecov]

Codecov Report

Attention: 25 lines in your changes are missing coverage. Please review.

Comparison is base (fdd373b) 40.11% compared to head (75b431d) 40.11%.
Report is 13 commits behind head on feature/notifications_refresh_p1.

Files	Patch %	Lines
.../ui/notifications/NotificationsListFragmentPage.kt	0.00%	25 Missing ⚠️

Additional details and impacted files

@@                         Coverage Diff                          @@
##           feature/notifications_refresh_p1   #20197      +/-   ##
====================================================================
- Coverage                             40.11%   40.11%   -0.01%     
====================================================================
  Files                                  1469     1469              
  Lines                                 67755    67757       +2     
  Branches                              11226    11226              
====================================================================
  Hits                                  27179    27179              
- Misses                                38082    38084       +2     
  Partials                               2494     2494              

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[antonis]

Thank you for your work on this @jarvislin 🙇
I've tested the implementation and the perceived performance has improved compared with the main feature branch 🎉