Merge "[QL-v3] Add feature flag." into tm-qpr-dev am: 71e2763b am: 26a421c1

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/21049750



Change-Id: I5b9cea8b4e89a6aa7e1a47402ccf790402624e0c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>