Merge "Send divider change to launcher to animate" into udc-dev am: 322d6946...

Merge "Send divider change to launcher to animate" into udc-dev am: 322d6946 am: 6e5d7886 am: d62c7335

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22538104



Change-Id: Iad6e66e174a4ad0d0002099446b1f7bf677d890b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>