title: Can I do a synchronous request with volley?
body: <p>Imagine I'm in a Service that already has a background thread. Can I do a request using volley in that same thread, so that callbacks happen synchronously?</p>
  <p>There are 2 reasons for this:</p>
  <ul>
  <li>First, I do not need another thread and it would be a waste to create it.</li>
  <li>Second, if I'm in a ServiceIntent, the execution of the thread will finish before the callback, and therefor I will have no response from Volley. I know I can create my own Service that has some thread with a runloop I can control, but it would be desirable having this functionality in volley.</li>
  </ul>