Merge "Adjust rubberband factor for notification stack overscroll" into tm-qpr-dev am: fcdc3d4355 am: 5ade54341d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20875464

Change-Id: I27fbf1e594f2c9e77e59f695913aac9ac46dd378
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>