[Audiosharing] Cancel notification when BT BLE both off

BluetoothAdapter#isLeAudioBroadcastSourceSupported and
isLeAudioBroadcastAssistantSupported returns ERROR_BLUETOOTH_NOT_ENABLED
when turning off BT/BLE and BT+BLE both off. Still need to cancel audio sharing notification in these case.

Test: atest
Bug: 372837932
Flag: com.android.settingslib.flags.enable_le_audio_sharing
Change-Id: Ib02d9ef10378996a8ee6b9f091935ddaaf7b3c99