Convert reader post list activity to Kotlin

[nbradbury]

Partially addresses CMM-307

I had intended to convert ReaderPostListActivity and ReaderPostListFragment to Kotlin in a single PR, but the latter turned out to be far more involved than expected. Because of this, I decided to handle them in separate PRs. In this PR, the activity is addressed.

Test A:

• Go to the Reader tab
• Tap a post
• Tap the blog name in the post's header
• Verify the list of posts works as expected

Test B

• Go to the My Site tab
• Under Prompts tap "View all responses"
• Verify the list of posts works as expected

Notes:

• I converted the activity to view binding, but could not remove a few calls to findViewById because they involve views not in the activity itself
• I resolved all the deprecation issues except for onActivityResult. That had to remain because we use startActivityForResult outside of this activity (for example, in ReaderActivityLauncher)

[dangermattic]

	2 Warnings
⚠️	This PR is larger than 300 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.
⚠️	PR is not assigned to a milestone.

Generated by 🚫 Danger

[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	pr21842-2e6b55c
	Commit	2e6b55c
	Direct Download	jetpack-prototype-build-pr21842-2e6b55c.apk

Note: Google Login is not supported on these builds.

[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	pr21842-2e6b55c
	Commit	2e6b55c
	Direct Download	wordpress-prototype-build-pr21842-2e6b55c.apk

Note: Google Login is not supported on these builds.

[wpmobilebot]

Project manifest changes for WordPress

The following changes in the WordPress's merged AndroidManifest.xml file were detected (build variant: wordpressVanillaRelease):

--- ./build/reports/diff_manifest/WordPress/wordpressVanillaRelease/base_manifest.txt	2025-04-30 14:59:16.984390391 +0000
+++ ./build/reports/diff_manifest/WordPress/wordpressVanillaRelease/head_manifest.txt	2025-04-30 14:59:19.294391578 +0000
@@ -648,7 +648,7 @@
             android:theme="@style/WordPress.NoActionBar" />
         <activity
             android:name="org.wordpress.android.ui.reader.ReaderSubsActivity"
-            android:theme="@style/WordPress.NoActionBar"
+            android:theme="@style/WordPress.NoActionBar.NoEdgeToEdge"
             android:windowSoftInputMode="stateHidden" />
         <activity
             android:name="org.wordpress.android.ui.reader.ReaderPhotoViewerActivity"

Go to https://buildkite.com/automattic/wordpress-android/builds/21758/canvas?sid=01968731-d213-4a67-acfe-d2a9e19c6ba8, click on the Artifacts tab and audit the files.

[wpmobilebot]

Project manifest changes for WordPress

The following changes in the WordPress's merged AndroidManifest.xml file were detected (build variant: jetpackVanillaRelease):

--- ./build/reports/diff_manifest/WordPress/jetpackVanillaRelease/base_manifest.txt	2025-04-30 14:59:32.277352360 +0000
+++ ./build/reports/diff_manifest/WordPress/jetpackVanillaRelease/head_manifest.txt	2025-04-30 14:59:34.297342427 +0000
@@ -675,7 +675,7 @@
             android:theme="@style/WordPress.NoActionBar" />
         <activity
             android:name="org.wordpress.android.ui.reader.ReaderSubsActivity"
-            android:theme="@style/WordPress.NoActionBar"
+            android:theme="@style/WordPress.NoActionBar.NoEdgeToEdge"
             android:windowSoftInputMode="stateHidden" />
         <activity
             android:name="org.wordpress.android.ui.reader.ReaderPhotoViewerActivity"

Go to https://buildkite.com/automattic/wordpress-android/builds/21758/canvas?sid=01968731-d214-4aea-8402-06e568e306d6, click on the Artifacts tab and audit the files.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 39.39%. Comparing base (fb127d8) to head (2e6b55c).
Report is 3 commits behind head on trunk.

Additional details and impacted files

@@           Coverage Diff           @@
##            trunk   #21842   +/-   ##
=======================================
  Coverage   39.39%   39.39%           
=======================================
  Files        2132     2132           
  Lines       99994    99994           
  Branches    15398    15398           
=======================================
  Hits        39397    39397           
  Misses      57115    57115           
  Partials     3482     3482           

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[adalpari]

LGTM and works as expected!

Screen_recording_20250430_095744.mp4

[sonarqubecloud]

Quality Gate passed

Issues
2 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