audio: Refactor streams implementation am: d5554cfae2 am: 3872e306cf

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

Change-Id: I8d0ae0917c65e2f0de1db7cd336b941454f8cbb1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>