Merge "Redesign the gesture tutorial for the Back gesture" into tm-qpr-dev am: 60c419b9b7 am: 813a373212

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/21779343

Change-Id: Icee872bf78260ec9aca83e86ad60b2d764ff69a7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>