RS Post Settings: Fix dialog selection lost on rotation

[nbradbury]

Description

When a user selects a new author, status, or format in the RS Post Settings dialogs and then rotates the device, the selection reverts to the original value. This happens because the dialog's local selection state uses remember which doesn't survive configuration changes.

This PR changes remember to rememberSaveable in StatusDialog, FormatDialog, and AuthorDialog so the selected index is preserved across configuration changes. The other dialogs (PasswordDialog, TextFieldDialog) already used rememberSaveable correctly.

Testing instructions

Dialog selection survives rotation:

1. Open a post's RS Post Settings screen
2. Tap on Status and select a different status (e.g., Draft → Pending)
3. Before tapping OK, rotate the device

• Verify the selection is still on the newly chosen status

4. Repeat for the Format dialog

• Verify the format selection persists through rotation

5. Repeat for the Author dialog

• Verify the author selection persists through rotation

[dangermattic]

	1 Warning
⚠️	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 Android by scanning the QR code below to install the corresponding build.

	App Name	WordPress Android
	Build Type	Debug
	Version	pr22699-86be205
	Build Number	1487
	Application ID	org.wordpress.android.prealpha
	Commit	86be205
	Installation URL	5col7p7o9duvo

Note: Google Login is not supported on these builds.

[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	pr22699-86be205
	Build Number	1487
	Application ID	com.jetpack.android.prealpha
	Commit	86be205
	Installation URL	7um97b7bgrvlg

Note: Google Login is not supported on these builds.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 37.50%. Comparing base (b7c4ddd) to head (86be205).
⚠️ Report is 1 commits behind head on trunk.

Files with missing lines	Patch %	Lines
...android/ui/postsrs/screens/PostRsSettingsScreen.kt	0.00%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            trunk   #22699   +/-   ##
=======================================
  Coverage   37.50%   37.50%           
=======================================
  Files        2298     2298           
  Lines      120741   120741           
  Branches    16531    16531           
=======================================
  Hits        45288    45288           
  Misses      71781    71781           
  Partials     3672     3672           

☔ 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.

[adalpari]

Looks great!! 🚢 it!