Merge "AudioParameter: Document usage of exiting and closing." into udc-dev...

Merge "AudioParameter: Document usage of exiting and closing." into udc-dev am: 9c0f35a5 am: e5ddf52b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/22316568



Change-Id: I0cde0ac8b6099e8acd6892c8a062aec0af730141
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>