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

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



Change-Id: I8616f3e7f56e83086c2032d94dc2b4c540c27378
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>