Merge "AudioParameter: Document usage of exiting and closing." am: d0cfe8f57b

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2562790

Change-Id: I9246bd9f8d269d08fadab1fa5f7d84692d0e5d77
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>