Add query API for hotword streams

- Add query API for device support of hotword_tap and hw_lookback flags
- Allow AudioService to call directly into AudioPolicyManager via AIDL

Bug: 237449755
Test: atest AudioRecordTest, atest AudioManagerTest
Change-Id: I730ca36b2dd42baabd8087a51160f75ab294e27b
7 files changed