Bluetooth Audio Policy APIs and HFP support integration

HFP android specific command protocol to implement android features.
Used this protocol to support the Audio Policy feature from the HFP
protocol. BluetoothDevice is the endpoint to invoke the feature and
later BLE Audio will also support it.
Cherry picked from wear OS

Dirty because of conflict + hide the API

Bug: 263323082
Bug: 235541516
Bug: 253059988
Test: atest BluetoothInstrumentationTests
Tag: #feature
Merged-In: I5fd6c7959a85104f2bb5e31809a0e250c2dd13d0
(cherry picked from commit cb85f8cb)
Change-Id: I5d2d8f4ab71c8ed4f2f2997a7e16fc6b863bc5ae