Merge "Adding support for easily extending Launcher DragAndDrop support" into tm-dev am: d7281d097d am: 3416df65a9

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/18287509

Change-Id: I5f0a45c44108ad3da26daa61825eafbb0d616de3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>