Merge "Add migration indication area feature flag" into udc-dev am: fe5a1dc8...

Merge "Add migration indication area feature flag" into udc-dev am: fe5a1dc8 am: 0da8b900 am: eb41e340 am: de13863c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23134078



Change-Id: Id81289800c50bba836198018b7b3ae5a789752d6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>