Audio policy: anonymize Bluetooth MAC addresses

Make sure APIs returning audio device descriptors from the native
audioserver anonymize the Bluetooth MAC addresses because those are considered
privacy sensitive.
Only expose the full MAC address to system and apps with BLUETOOTH_CONNECT
permission.

APIs modified: listAudioPorts, listAudioPatches, getAudioPort
APIs that can only be called from system server or only convey port IDs
are not modified.

Bug: 285588444
Test: atest AudioManagerTest
Test: atest RoutingTest
Test: atest AudioCommunicationDeviceTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:8682ced79a56ed01874b09881b41359606815dfa)
Merged-In: Ia6bac184f5f39ed9d538f762ebb89bcceb44ae50
Change-Id: Ia6bac184f5f39ed9d538f762ebb89bcceb44ae50