Merge "Disable back gesture on the home and -1 screen" into udc-dev am: e8d48813

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21553696



Change-Id: I1044558b62c62155be7b8b25aa2d21a4ef2388c5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>