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

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

Change-Id: I42b6d61dccc32614de8d7c83f6e8da7e5fad5e46
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>