Merge "Attempt to fix concurrent modification issue in QuickstepWidgetHolder" into udc-dev am: 4c233bd645 am: c98acd422d

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

Change-Id: I0c99239c4146228caecd5d46dd9f27efe2cf538f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>