title: What does `android.accounts.Account.type` reference?
body: <p>In the Google Play Developer console, I'm getting warnings in the Pre-Launch tests mentioning:</p>
  
  <p><code>java.lang.NullPointerException: Attempt to read from field 'java.lang.String android.accounts.Account.type' on a null object reference</code></p>
  
  <p>The app never crashes and the test succeeds, but the warning is still there in details of the test. What is <code>android.accounts.Account</code> and how can I make sure it doesn't have issues?</p>