static toQuery(data) {
    return shaka.util.CmcdManager.serialize(data);
  }
Convert a CMCD data object to query args according to the rules
defined in the section 2.2 and 3.2 of
[CTA-5004](https://cdn.cta.tech/cta/media/media/resources/standards/pdfs/cta-5004-final.pdf).

@param {CmcdData} data The CMCD data object
@return {string}