[automerger skipped] Ensure starting position rect isn't empty in FloatingTaskView am: f8efb32379 -s ours

am skip reason: Merged-In Icb546a05d383d1997a92471fc1de3ffc37d06eca with SHA-1 410681a955 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/27730882

Change-Id: I0758255916837fe91d0f37b884b6c0e8e04f5123
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>