Convert notes adapter to kotlin

[mkevins]

Description

This PR refactors the NotesAdapter class to Kotlin. This is intended to improve the further development of the features we are adding in the notifications refresh project.

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To Test:

• Run the app using this branch (either build in Android Studio, or via one of the apks)
• Login to the app using an account which has some activity (with various kinds of notifications)
• Smoke test the notifications behavior:
  • Scroll the notifications list and ensure they all look correct
  • Tap on some of the notifications to ensure that the behavior is still correct (e.g. tap a like notification to see the list of users who liked the comment or post, etc.)

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Regression Notes

1. Potential unintended areas of impact

Notifications

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

Manual tests

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

With the code in its current state, adding automated tests would exceed the scope allotted for this work.

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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.

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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)

[peril-wordpress-mobile]

	Warnings
⚠️	PR has more than 300 lines of code changing. Consider splitting into smaller PRs if possible.

Generated by 🚫 dangerJS

[dangermattic]

	2 Warnings
⚠️	This PR is larger than 300 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.
⚠️	Class FILTERS is missing tests, but unit-tests-exemption label was set to ignore this.

Generated by 🚫 Danger

[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	pr20129-d2c57d3
	Commit	d2c57d3
	Direct Download	wordpress-prototype-build-pr20129-d2c57d3.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	pr20129-d2c57d3
	Commit	d2c57d3
	Direct Download	jetpack-prototype-build-pr20129-d2c57d3.apk

Note: Google Login is not supported on these builds.

[jarvislin]

Nice work! Thanks for converting the adapter to Kotlin.
The test result is as expected.
There's no blocker, but there are some details can be refactored.
Feel free to merge this PR.

[antonis]

Thank you for grabbing the opportunity to improve the codebase @mkevins 🙇
The code looks great and there was no change in the app behaviour in my tests 🎉

[mkevins]

Thank you both for reviewing and testing!