Fix issue with display cutout being incorrectly rotated

- Use the existing display cutout method to rotate the cutout correctly
  so that splitscreen can calculate the correct snap target positions

Fixes: 325317088
Test: atest WMShellUnitTests
Test: Manual, on a device with a hole punch camera, rotate while in
      split
Change-Id: I681d01d137e12e3dbb83f28188b9635ea70ca14e