Prevent crashes in BluetoothMedic from missing Android 12 permissions

[davidgyoung]

• also removed unused broadcast notification code

This addresses the issue reported here: https://stackoverflow.com/questions/74709808/altbeacon-bluetoothmedic-crashes-with-android-version-12-13

This also deprecates the BluetoothMedic’s power cycling method in favor of a renamed legacy method that makes it clear that power cycling is no longer possible on Android 13 per #1109