WM: Stop tampering with sysuiVisibility for layout

Instead of changing the sysuiVisibility to get the desired layout behavior
calculate the implied sysuiVisibility flags at layout time. This allows us
to check what the window originally requested, which will be needed later
for cutout-aware layout.

Bug: 65689439
Test: runtest -x services/tests/servicestests/src/com/android/server/policy/PhoneWindowManagerLayoutTest.java
Change-Id: I195f7b8ad535731614ea8f5fb2af2f001fd13036