Introduce a private flag to extend frame with cutout

This patch introduced a new private flag
PRIVATE_FLAG_LAYOUT_SIZE_EXTENDED_TO_CUTOUT to let the window extend
it's requested window frame to contain the display cutout frame. This
is useful for the case of navigation bar. Without it, the navigation
bar may not have enough space to layout it's content when it's on the
same side as the display cutout. With the flag set, the Navigation
bar will have the requested size plus the navigation bar size as its
frame.

Bug: 203031262
Bug: 161689946
Test: See reproduce steps in b/203031262
Test: atest WindowLayoutTests
Change-Id: Id1d6f09dc421b5f25e16e4aca6282b6deec2e8c4