Merge "Attempt to fix concurrent modification issue in QuickstepWidgetHolder" into udc-dev am: 4c233bd645 am: 533ba49d6a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/22391715

Change-Id: Iaa0ca59b4a78443582403f9077ee46d014d7c0fa
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>