Merge "Simulating a split screen CellLayout using one CellLayout" into tm-qpr-dev am: 726e9acea4

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/21182332

Change-Id: I764dc15f1be7f7e2dd0efce0ef27fc56a3acb7ed
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>