Android 12

[bengelhaupt]

This year's upcoming release seems to introduce multiple changes relevant for our app.
See https://developer.android.com/about/versions/12/behavior-changes-all , https://developer.android.com/about/versions/12/behavior-changes-12 and https://developer.android.com/about/versions/12/features

Probably needs adjustment

• Adjust for new Deep Link declarations and link verification
• Adjust for new SplashScreen feature to avoid showing two splash screens
  • Set our splash logo to be displayed instead of the app icon
  • Check whether our Health Check can be done in the new screen and if true remove our SplashActivity

Probably only needs checking / testing

• Test new Picture-In-Picture behavior
• Test whether login and SSO still work after WebView Cookie changes
• Test new foreground service and power management behavior (here and here)
• Check whether all components with intent-filters are exported, otherwise app won't install
• Check whether all intents are launched safe