Merge "Have the top activity follow Task resizability" into sc-v2-dev am: 0c947aa4 am: 83de1f9d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16186313

Change-Id: I612014b5e7ce56c96abacb44e4a8fd258576657a