Merge "Add feature flag and attribute for responsive grid" into udc-dev am:...

Merge "Add feature flag and attribute for responsive grid" into udc-dev am: 0740b7fb am: 46cbbc1a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/22476842



Change-Id: Ifcc375137c5e8269d9d7a8ab3e5a5e43e085a951
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>