Merge "Pause transient hide activities before resuming next" into udc-qpr-dev am: b73baea1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24076211



Change-Id: I5b33d4bde7cf74d549eff18b41bf02d020d2abdd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>