Merge "Fix NPE inside REcyclerViewFastScroller" into sc-dev am: 8c0f8fba9c am: 32fbf28ecf

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14966513

Change-Id: Icd48cef71905a3777211ca344a766a93a233e40c