Merge "Migrate IDP_GRID_NAME usage to LauncherPrefs" into tm-qpr-dev am: 3788da62 am: 844dc76a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/21359246



Change-Id: I77d01b752d13a823b6d41db0b52e62ef46985675
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>