My Site Dashboard: Initial Screen App Setting

[zwarm]

Parent #15989

This PR adds the “initial screen” setting to the App Settings view. The setting is only visible when tabs are enabled for My Site Dashboard. This setting will persist until the app is uninstalled/reinstalled - similar to other device app settings.

Merge Instructions

• You can review, but not merge this PR yet. I am waiting on some verifications from the iOS team with regards to what the default value should be for the setting. I will review the "do not merge label" after the direction has been clarified.

To test
Do a clean install of the app and don't enable the MySiteDashboardTabsFeatureConfig flag. Then:

1. Login or create a new account
2. Navigate to Me → App Settings
3. Note: You don’t see an "Initial Screen" option
4. Navigate to Me → App Settings → Debug
5. Enable the MySiteDashboardTabsFeatureConfig flag and restart the App
6. When the app has restarted, Navigate to Me → App Settings
7. Note: You see an "Initial Screen" option
8. Change the value
9. Make sure that an event is fired on the console, like: 🔵 Tracked: app_settings_initial_screen_changed, Properties: {"default_tab_experiment":"site_menu","selected":"site_menu"}
10. Close and reopen the app
11. Navigate back to Me → App Settings
12. Note: The option you selected is now the default

Regression Notes

1. Potential unintended areas of impact
   The app setting does not show or hide the initial screen setting

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

3. What automated tests I added (or what prevented me from doing so)
   There are no unit tests for the AppSettingsFragment.

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.

[peril-wordpress-mobile]

You can trigger optional UI/connected tests for these changes by visiting CircleCI here.

[peril-wordpress-mobile]

You can test the changes on this Pull Request by downloading the APKs:

• WordPress-pr-16252-build-120849.apk

• Jetpack-pr-16252-build-120849.apk

[ashiagr]

LGTM so far, @zwarm. 👍 I just left one comment. I'll wait to review till further implementation.

[ashiagr]

LGTM 👍
Feel free to merge it when CI is done.