Respect camera compat aspect ratio in freeform when requested.

Camera Compat for Freeform applies aspect ratio to avoid stretching
issues.

Flag: com.android.window.flags.enable_camera_compat_for_desktop_windowing
Fixes: 392103971
Test: atest WmTests:SizeCompatTests
Change-Id: I1b6840259e908f6d724cf34e491be6bf1cd5d485