Merge "Animate height of tracked hun during shade transition." into sc-dev am:...

Merge "Animate height of tracked hun during shade transition." into sc-dev am: 7e4b3fda am: de8fa1f2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15146248

Change-Id: Ieb1d8491091cfe81c9465f7634127859a0d172ca