title: enableAutoActivityTracking not automatically tracking activities?
body: <p>I'm currently initializing my Google Analytics tracker as follows:</p>
  
  <pre><code>GoogleAnalytics analytics = GoogleAnalytics.getInstance(context);
  Tracker mGATracker = analytics.newTracker(context.getString(R.string.ga_code));
  mGATracker.setSessionTimeout(300);
  mGATracker.enableAutoActivityTracking(true);
  </code></pre>
  
  <p>It works fine for sending custom events and such, though I'm not seeing any auto activity tracking (looking under Behavior -> Events -> Screens in GA). Am I not able to enable this setting in this way?</p>