[automerger skipped] All apps memory leak fix / unregister data observer am: 349c7c82f4 -s ours

am skip reason: Merged-In Ia5732cced959e4a199d9c2b59f1f3941a2e23552 with SHA-1 6e72c8bbba is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15673928

Change-Id: I33d580c95459e06324d2f281c61e8b4450d5552a