title: New Firebase events are being logged but when uploading it says no data
body: <p>Here is the debug log that speak for itself</p>
  
  <pre><code>2016-06-24 00:50:34.965 testApp[13184:] &lt;FIRAnalytics/DEBUG&gt; Event logged. Event name, event params: select_content, {
          "_o" = app;
          "content_type" = "Share_Screen";
          "item_id" = 4;
      }
  2016-06-24 00:50:40.969 testApp[13184:] &lt;FIRAnalytics/DEBUG&gt; Event logged. Event name, event params: select_content, {
          "_o" = app;
          "content_type" = "About_Screen";
          "item_id" = 5;
      }
  </code></pre>
  
  <p>I have truncated bunch of other events for sake of brevity. </p>
  
  <pre><code>2016-06-24 00:50:46.346 testApp[13184:] &lt;FIRAnalytics/DEBUG&gt; Do not schedule an upload task. Task already exists
  2016-06-24 00:50:46.394 testApp[13184:] &lt;FIRAnalytics/DEBUG&gt; No data to upload. Upload task will not be scheduled
  2016-06-24 00:50:46.394 testApp[13184:] &lt;FIRAnalytics/DEBUG&gt; Canceling active timer
  2016-06-24 00:50:46.395 testApp[13184:] &lt;FIRAnalytics/DEBUG&gt; Cancelling background upload task.
  </code></pre>
  
  <p>Does anyone have clue what is happening here. I have waiting whole day to these events to show up in firebase analytics.</p>