audio: Refactor streams implementation am: d5554cfa am: 3872e306 am: 0dbc0388 am: 78435405

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2639436



Change-Id: I5dffc5251c3c1db53d0541ef5242b544d7a0438f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>