Merge "Polish the gesture navigation tutorial sandbox" into sc-dev am: cfa0baeca6 am: bd54f2bcb6

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14924450

Change-Id: Ic238c88182e6d65db48f7c23c221b6b96a797131