title: On JobService of a JobScheduler
body: <p>I've couple of questions regarding JobScheduler service of Android.</p>
  
  <p>First of all, how or/and when the related JobService of a JobScheduler started? For example, after I call schedule method or something else?</p>
  
  <p>I'm also a bit curious about how exactly we pass a binder component to the bound JobService (Is it extracted from the ComponentName instance?). </p>
  
  <p>And what's happenning to the messages queued in the JobService's message queue (not the system service JobScheduler's queue) when the app has gone (crashed, closed, stopped)? </p>
  
  <p>Hope they're clear.</p>
  
  <p>Thanks in advance</p>