Merge "Make the content animated together with the app bar" into sc-dev am:...

Merge "Make the content animated together with the app bar" into sc-dev am: 1028f0b6 am: e234efb3 am: 7931f215

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14732027

Change-Id: I40dc4fb3fc156b0646911ee4b3fba6c592831745