vaapisink: when updating the caps, reset rotation
When an element upstream changes settings (e.g. crop), new caps are sent to vaapisink. When vaapisink was rotating the image, it needs to re-evaluate if the sink needs to rotate the image.
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When an element upstream changes settings (e.g. crop), new caps are sent to vaapisink. When vaapisink was rotating the image, it needs to re-evaluate if the sink needs to rotate the image.