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

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

Change-Id: Ie919fad86d8da35b0fa297bcf66e4322d0ae0611
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>