EGL_EXT_surface_CTA861_3_metadata
https://www.khronos.org/registry/egl/specs/eglspec.1.5.pdf
EGL_EXT_surface_CTA861_3_metadata

	EGL_CTA861_3_MAX_CONTENT_LIGHT_LEVEL_EXT 0x3360
	EGL_CTA861_3_MAX_FRAME_AVERAGE_LEVEL_EXT 0x3361
