Don't require width/height on the caps. Use the SOF header to find width/height
and fall back to the caps if there is no SOF. Also use the SOF info to find the
subsampling and quantization tables used. This allows us to set the right type
value in the JPEG rtp header.

Deprecate the quality property, it's unused now and it was used wrongly before.

Always send full quant tables for now until we have some code to detect default
ones.

Fixes #580880