Merge "Camera: Exit PreviewStreamSpacer when disconnecting stream" into tm-dev...

Merge "Camera: Exit PreviewStreamSpacer when disconnecting stream" into tm-dev am: c3a3ee83 am: 2aa59434 am: 3a9243ec am: b2354511

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/18415584



Change-Id: I6640d908a70120a6093c9c9a33297f901df6d4e9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>