Add getAudioLocation implementation

The change contains
1. Update the sink audio location as it is obtained from the remote device's PACS record
2. Store the audio location in the deviceAudioLocationMap
3. Clear the audio location as device unbonded
4. Support getAudioLocation function to return the sink audio location

Bug: 197199736
Test: build pass
Change-Id: I565f52b3b26afcc4990b5bb89ccc550e7db3607a