WM: Fix DisplayCutout computation in WindowState.computeFrameLw

Fixes an issue where we took the wrong WindowFrame.mFrame when
computing the DisplayCutout for the window state.

Fixes: 113272819
Test: atest WindowStateTests DisplayCutoutTests
Change-Id: Ida409591608e35fe993d0228da2fcb4f7eb25d5a
2 files changed