Update FBSource to use Flow 0.22

Reviewed By: gabelevi

Differential Revision: D3021265

fb-gh-sync-id: f4c857505c1a7b6b813bcdccd629e595ef7a81af
shipit-source-id: f4c857505c1a7b6b813bcdccd629e595ef7a81af

Libraries/Network/NetInfo.js

@@ -222,6 +222,7 @@ const NetInfo = {
       eventName: ChangeEventName,
       handler: Function
     ): void {
+      /* $FlowFixMe(site=react_native) */
       const listener = _isConnectedSubscriptions.get(handler);
       NetInfo.removeEventListener(
         eventName,