feat(recording): Add analytics event and logging.

react/features/recording/components/Recording/StartRecordingDialogContent.web.js

 import React, { Component } from 'react';
 import { connect } from 'react-redux';
 
+import {
+    createRecordingDialogEvent,
+    sendAnalytics
+} from '../../../analytics';
 import { translate } from '../../../base/i18n';
 import { authorizeDropbox, updateDropboxToken } from '../../../base/oauth';
 
      * @returns {void}
      */
     _onSignInClick() {
+        sendAnalytics(
+            createRecordingDialogEvent('start', 'signIn.button')
+        );
         this.props.dispatch(authorizeDropbox());
     }
 
      * @returns {void}
      */
     _onSignOutClick() {
+        sendAnalytics(
+            createRecordingDialogEvent('start', 'signOut.button')
+        );
         this.props.dispatch(updateDropboxToken());
     }
 }

react/features/recording/functions.js

 
 import { JitsiRecordingConstants } from '../base/lib-jitsi-meet';
 
+const logger = require('jitsi-meet-logger').getLogger(__filename);
+
 /**
  * Searches in the passed in redux state for an active recording session of the
  * passed in mode.
             spaceLeft: Math.floor((allocated - used) / 1048576)// 1MiB=1048576B
         };
 
-    }, () => undefined);
+    }, error => {
+        logger.error(error);
+
+        return undefined;
+    });
 }