Notification Support in Android 13

[abertschi]

Check in simulator if new restrictions were introduced in Android 13

another thing, it doesn't show a notification even if 'always-on notification is enabled'. the app does work, as tapping the music note on the second screen mutes audio, and fires the 'ad detected' notification.
the device now runs Android 13, so i had to enable permissions (allow 'restricted settings'), so i could fully grant them to the app.

#93