Since rotation is handled in place, the swapchain is recreated right
after surfaceChanged, and the surface can still report the previous
orientation's extent. On a Galaxy S8+ this happened in about one in four
rotations, leaving a portrait swapchain on a landscape window or the
other way around, squashed into half the screen until the next rotation.
If the extent is exactly the window size transposed, use the window size.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
