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: c677fb38

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



Change-Id: I133546366f3172e25933dcf4ea24f98f567d4847
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>