Fixed issue with SCREEN_ORIENTATION_BEHIND not working correctly

If an app specifies SCREEN_ORIENTATION_BEHIND, then use the orientation
of the app behind it regardless of the visibility state of the app
behind.

Fixes: 35281868
Test: bit FrameworksServicesTests:com.android.server.wm.WindowContainerTests
Test: bit FrameworksServicesTests:com.android.server.wm.AppWindowTokenTests
Test: bit FrameworksServicesTests:com.android.server.wm.TaskStackTests
Change-Id: Ieba4e4bb1a7f47cd6f082491d37fcabcf5bd5199