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

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



Change-Id: I33e1e8a3dff1da1310429087778da4d1f21a9c1f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>