Merge "New shelf shape, notification corner animations on scroll" into sc-dev...

Merge "New shelf shape, notification corner animations on scroll" into sc-dev am: 2c4f9dda am: 04c872c7 am: 31d763a6

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13996266

Change-Id: I78762addd79cf65f70771069d4908ead147338fe