Merge "Adding nullcheck while launching task during quickswitch" into ub-launcher3-rvc-qpr-dev am: 6381d38249

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/12119527

Change-Id: I48126c4905e20135cdb7091777d9cdf0e2d5f6ba