https://w3c.github.io/mediasession/#convert-artwork-algorithm is putting an URL in a MediaImage src which is a USVString #360
Description
As per feedback from #359 (review), we might want to do the following:
- Make sure that we set to MediaImage src a serialization of the parsed URL in convert-artwork-algorithm.
- Make sure that the fetch image is parsing again the src value (asserting parsing does not fail). Alternatively we store the parsed URL in a private slot of the MediaImage.