Add query API for hotword flag support

- Add API to query for device support for hotword record flags.
- Call through AudioService to enforce permissions.
- Clean up dependency injection, mocking in AudioService.
- Directly call APM from AudioService using AIDL, instead of JNI.

Test: atest AudioManagerTest, atest AudioRecordTest
Test: AudioService unit tests
Bug: 237449755
Change-Id: I42178b3895e4eb76dcabfc7b0259fc545223dcb6