Merge "Update gesture nav tutorial back left and right videos" into sc-dev am: bef29071b5 am: 3908e51796

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14969574

Change-Id: Ia92ab0f7165c533aac8d92ce5d90e36391f69d57