Merge "Default hide animation leash of opening tasks." into udc-dev am: b5b4eb70 am: c70cd5b7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22601627



Change-Id: I3724c759efec03b02cd7014e4ea6b7acd01f9c28
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>