Enable letterbox configuration for camera compat freeform.

This was missed in the CL that intruduced `shouldCameraCompatControlOrientation`.

Flag: com.android.window.flags.enable_camera_compat_for_desktop_windowing
Test: atest WmTests:ActivityRecordTests
Bug: 347864073
Change-Id: I4530d3a8b503c835fe770b2ad0f55f9a5f5b5a7d