title: JobScheduler and the JobIntentService
body: <p>So I currently use the <code>JobScheduler</code> to schedule jobs based on various conditions and I was thinking I would want to execute them using the <code>JobIntentService</code>. However, I see that the <code>JobIntentService</code> also has a <code>enqueueWork()</code> method. Is this a replacement for the <code>JobScheduler</code>? Is it optional so I can ignore it and just use the <code>JobScheduler</code> to schedule the tasks and let the <code>JobIntentService</code> only worry about execution?</p>
  
  <p>Thanks.</p>