Revert "Remove ping requests now that it has been consolidated with status requests"

This reverts commit d9a6be2ac6.

webroot/js/app-video-only.js

@@ -20,6 +20,7 @@ import {
 import {
   URL_CONFIG,
   URL_STATUS,
+  URL_VIEWER_PING,
   TIMER_STATUS_UPDATE,
   TIMER_STREAM_DURATION_COUNTER,
   TEMP_IMAGE,
@@ -119,6 +120,12 @@ export default class VideoOnly extends Component {
         this.handleOfflineMode();
         this.handleNetworkingError(`Stream status: ${error}`);
       });
+
+    // Ping the API to let them know we're an active viewer
+    fetch(URL_VIEWER_PING).catch((error) => {
+      this.handleOfflineMode();
+      this.handleNetworkingError(`Viewer PING error: ${error}`);
+    });
   }
 
   setConfigData(data = {}) {