Merge "Animate height of tracked hun during shade transition." into sc-dev am: 7e4b3fda am: de8fa1f2 am: 83f803c7

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

Change-Id: Ib5bcf827b2c2afeae775d84a8cd9676add1d476f