function getParsedManifest(backgroundColor, themeColor) {
      return parseManifest(`{
        "background_color": "${backgroundColor}",
        "theme_color": "${themeColor}"
      }`, EXAMPLE_MANIFEST_URL, EXAMPLE_DOC_URL);
    }
Create a manifest with the specified colors and return the parsed result.
@param {string} backgroundColor
@param {string} themeColor