Merge "Create transition when converting an Activity to translucent" into udc-dev am: cf71476f am: 964c1a48

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



Change-Id: I9e08411cdc39f685bf1875251f2c94565e1aa2e6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>