Merge "Update gesture nav tutorial back left and right videos" into sc-dev am: bef29071b5 am: 3908e51796 am: 520ccd7f57

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

Change-Id: I9e2d74e6d4743c32e4b2a1fd0572c6aa0792a885