Merge "Simplify trackpad multi-finger gesture recognition logic for back...

Merge "Simplify trackpad multi-finger gesture recognition logic for back notification shade" into udc-qpr-dev am: f6e45211 am: 0fb0a4cb

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23451434



Change-Id: I33ede2549a2ffeb7e9339f9c5b1af9706862fc12
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>