Merge "Use activity-exit animation for translucent-only close" into udc-dev am: d31c9412 am: f18fce66 am: 2299f1df am: c4fb9d97

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



Change-Id: Ifc165f51e3cae002f46ce6c84355e9850638629b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>