Location handling cleanup

[nbradbury]

This WIP PR takes care of "cleaning up" after switching to per-app language preferences. We had a lot of code to handle locale changes, but the system now handles all of that for us. Testing steps are the same as with previous PRs:

Test 1:

• Run the app on a device using Android 13 or later
• Go to App Settings and tap "Interface language"
• Note that the system dialog for "App Language" appears instead of our own
• Verify changing languages works

Test 2:

• Perform the above with an older device and verify our own language dialog appears and changing languages works

Note: There is likely more cleaning up that can be done, but I didn't want to make this PR even larger that it already is.

[dangermattic]

	1 Warning
⚠️	This PR is larger than 300 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.

	1 Message
📖	This PR is still a Draft: some checks will be skipped.

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	pr21527-7256d66
	Commit	7256d66
	Direct Download	wordpress-prototype-build-pr21527-7256d66.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	pr21527-7256d66
	Commit	7256d66
	Direct Download	jetpack-prototype-build-pr21527-7256d66.apk

Note: Google Login is not supported on these builds.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.8% Duplication on New Code

See analysis details on SonarQube Cloud

[nbradbury]

This PR became too unwieldy so I'm closing it in favor of multiple smaller PRs.