Caught by flutter/engine#50993, which I am reverting.

I think this code is intended to be virtually unused, though if an end-user tried it (it's available in stable) it would render incorrectly. Marking as a P1 because this will block @dnfield's work to enable Impeller on scenario_app (since we need ImageReaderSurfaceProducer).

See https://flutter-engine-gold.skia.org/search?crs=github&issue=50993&negative=true&patchsets=2&untriaged=false.

ExternalTextureTests_testRotatedMediaSurface_180

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• ExternalTextureTests_testRotatedMediaSurface_270
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