Merge "Pass the keep clear areas through proper implementation. The...

Merge "Pass the keep clear areas through proper implementation. The PipController is not registered as DisplayWindowListener, but this inner implementation is." into tm-dev am: 34fd7c52

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17366228

Change-Id: I63ce2cd397e3bb9126da3d0649e7f0af3d88d3c7