audio: Implementation of audio I/O, part I am: 6a4872dff0 am: 1909ccc5b6 am: 9190804521

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2197183

Change-Id: I909f8bc592dd4182263e2cbec4ba9681671e0fd0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>