4f9622c56b
Fixes https://github.com/flutter/flutter/issues/125906. Fixes https://github.com/flutter/flutter/issues/125908. Going to add this back once I'm able to work out why the clear colors aren't working on GL/Vulkan. Stepping though with a debugger for both GLES and Vulkan, the clear colors seems to be getting piped through as expected. But the frame captures reveal that they're actually not.
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