Merge "Volume: Hide dialog when motion cancelled, as well as when finished." into tm-qpr-dev am: f597a6c3ec am: fb968542ae am: 1567e77c14 am: 704284b843

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21940803

Change-Id: I0f2232337eddf0399004d43a5d5b195c218e81bc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>