Background audio, warnings, disable device owner

[threethan]

TL;DR

• Background audio fixed & improved
• Better UI w/ More warnings
• Ability to disable device owner & uninstall Oculess

  ---

  Full Changes

  I've made a number of updates to my background audio function

• Uses a different AppOpsHelper class which supports android 12
• Runs automatically on system startup, and should stay running more reliably. (The button now tells users this instead of activating the feature)
• Added a permission so that non-system apps will be scanned in android >10
• System apps are excluded
• Audio is fixed every second (previously 2 seconds)
• Apps are rescanned every minute (previously once on button press)

The UI has been tweaked to be more clean and better warn users

• Colors have been changed to better reflect system UI, and to improve visibility of buttons in popups
• The option to remove accounts has been properly marked as unsafe
  • The popup now explains that removing a Meta account is permanent
• The main activity now displays a text directing the user to go to GitHub for info, rather than the current status of the companion server
  • The status of the companion server is still displayed on the button and has been added to the popup it activates
• Added "Enable Device Ownership Button" that displays the following: This can be undone, but REMOVING ACCOUNTS IS PERMANENT.\n1. Remove all accounts with the button above\n2. Using ADB: adb shell dpm set-device-owner com.bos.oculess/.DevAdminReceiver\n
• Added "Disable Device Ownership Button" (displays in place of the enable button when applicable) that allows device owner to be deactivated, after which the app can be uninstalled normally. This doesn't return the Meta account though
• The option to disable updates has been removed entirely
  • Instead, I added ADB commands for this to the readme, as users would need ADB to unf*** themselves anyways
  • The button and code are still there, but it's set to visibility:gone in the layout so it cannot be accessed by users

Additional Fixes:

• App icon now displays correctly in all contexts
• The Remove Accounts button now opens the proper intent, instead of just the main page of settings
• I added snippets to the ReadMe to disable telemetry apps with ADB as an alternative to Oculess
• The ReadMe now mentions that background audio is natively supported on Quest 2 & Pro

[basti564]

Thanks for the changes. Looks good!