Merge "[play] Add feature flag for play." into tm-qpr-dev am: 2560660062 am: 3665c29238

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/21077874

Change-Id: I57be0271774191dd85b94dd8315960b03f346d25
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>