Merge "Create transition when converting an Activity to translucent" into...

Merge "Create transition when converting an Activity to translucent" into udc-dev am: cf71476f am: 2e6da43d am: f5520e6e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22779397



Change-Id: Ifc264cfb02967722d0743ddbd820f0f7369b20c3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>