Merge "Only apply transient visibility for root task" into udc-dev am: deaed7c7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23557640



Change-Id: I8674ffdc594d0ea90004c4394f5cc222171c0a49
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>