Merge "Add null check for mRemoteTargetHandles for side task launch" into sc-v2-dev am: a6c2e3f263 am: 949f9763bb

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/16828915

Change-Id: I85480ddb976bf34f2759ddbd6ad8f8a235716ae9