Skip WM tests for custom window occlusion.

Bug: 396173903
Fix: 349374915
Bug: 396168998
Fix: 349403766
Bug: 396165850
Fix: 349396128
Bug: 398861504
Test: Devices with appropriate property are skipped.
Flag: TEST_ONLY
Change-Id: Ib124dcae332342edb0ec5fee3242f2269c64d7a7