Merge "Removing UI dependency from LauncherModel in case of 2-panel layout" into sc-v2-dev am: d327290762 am: 3694d653c4

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15302087

Change-Id: I438361fe609dcfe38d5455ceb3139d5e5784ae06