Force layoutInDisplayCutoutMode to be always for edge-to-edge

If a window is forced to go edge-to-edge and fills the display, its
layoutInDisplayCutoutMode will be forced to be
LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS.

Bug: 309578419
Flag: com.android.window.flags.enforce_edge_to_edge
Test: PhoneWindowTest
Change-Id: I3e994a18d442d18868671c8a84f813fdc3344e3e