audio: Introduce read PCM from FMQ session functionality

This is required for audio input direction HAL session support.

Bug:
Tag: #feature
Test: vts-tradefed run vts -m VtsHalBluetoothAudioV2_1TargetTest
Sponsor: jpawlowski@
Change-Id: I3cd25f4af0c5c16074b17dd128de95dd53978379
3 files changed