Merge "Fix crash if AM returns empty task list" into tm-dev am: aca91898a8

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/18379858

Change-Id: Ia13c75dadf005fcb70aac793c643cdc3b0718ace
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>