Merge "Reset fast scroller when All Apps resets." into tm-qpr-dev am: 5969e0524a am: 199eb1f5b3

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/21406904

Change-Id: I62d3f2949704e68031894aeea77e395685ce6bd5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>