Merge "Add null-check to findLastActiveTaskAndRunCallback" into udc-dev am: bfa0fae851 am: 396bb7c262

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/23590296

Change-Id: Ifd444206ac34ba591bf2f6033bf6961fadb5425f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>