Make non-floating PhoneWindow extend into display cutout insets

The exsiting logic already enforces non-floating PhoneWindow to extends
into system bar areas by default. This CL makes it extend into the
cutout area as well if the edge-to-edge enforcement is enabled.

Bug: 309578419
Test: atest PhoneWindowTest
Change-Id: Id264ba939eb04634bb1916551b081b30112278ae