Display Cutout: Dispatch Cutout from WindowManager

Adds the logic to dispatch a DisplayCutout from DisplayFrames
through WindowState to the View hierarchy. Does however not yet
change how windows are laid out in response to a DisplayCutout.

The display cutout is currently never present, the following CL
will add logic to emulate a display cutout on devices that do
not have a physical one.

Bug: 65689439
Test: runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/wm/WindowFrameTests.java
Change-Id: Ie4cd4b575755b66a7ffead31e28640983ef4894e