Merge "Use activity-exit animation for translucent-only close" into udc-dev...

Merge "Use activity-exit animation for translucent-only close" into udc-dev am: d31c9412 am: f18fce66

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23439461



Change-Id: I56b14f2635d34aced8d47bffebe939a8179dc460
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>