getSettings = (formFactor, screenEmulation, emulatedUserAgent) => ({
      formFactor: formFactor,
      screenEmulation,
      emulatedUserAgent: emulatedUserAgent === undefined ? constants.userAgents[formFactor] : false,
    })
@param {LH.SharedFlagsSettings['formFactor']} formFactor
@param {LH.SharedFlagsSettings['screenEmulation']} screenEmulation
@param {LH.SharedFlagsSettings['emulatedUserAgent']} emulatedUserAgent