Merge "audio: Add IStreamCommon.prepareToClose method" am: 940ca8996a am: 1dbc39ea23

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2475087

Change-Id: I49366c4b88e0d6161337888825c5c6fcd1ef0220
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>