Respect the edge-to-edge flags in splash screen window

This CL will only set LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS by default
when the edge-to-edge policy is enforced in the app.

Bug: 309578419
Test: Open Calculator in landscape with a device with a display cutout.
      See if the splash screen and the main window are both laid out
      into the cutout area or both not laid out into the cutout area.
Change-Id: I75a219748627ff17f8d0229356512251b8962867