Merge "Adding support for LauncherAppWidgetHostView in CellLayout" into tm-dev am: 50b4ddc3f0

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17958866

Change-Id: Ic5b4ff065a3f50f49814a805c39fb1ab4dafa6c5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>