Make sure notication computation can't crash the dispatch

Summary:
Collecting notifications is done in the store.subscribe. If this throws however, the entire original dispatch throws (really Redux?!). So added a try catch around collecting notifications. This stops plugins from crashing while processing the queue (in fact this could happen during any Redux dispatch).

Will look into a more robust mechanism in the future

I suspect this also fixes the hanging graphQL issue

Reviewed By: jknoxville

Differential Revision: D20619226

fbshipit-source-id: 2f6b8e13a5c884dd63b6963d317474a2abf0725c

desktop/app/src/dispatcher/notifications.tsx

@@ -119,15 +119,23 @@ export default (store: Store, logger: Logger) => {
           | typeof FlipperPlugin
           | typeof FlipperDevicePlugin = pluginMap.get(pluginName);
         if (persistingPlugin && persistingPlugin.getActiveNotifications) {
+          try {
+            const notifications = persistingPlugin.getActiveNotifications(
+              pluginStates[key],
+            );
             store.dispatch(
               setActiveNotifications({
-              notifications: persistingPlugin.getActiveNotifications(
-                pluginStates[key],
-              ),
+                notifications,
                 client,
                 pluginId: pluginName,
               }),
             );
+          } catch (e) {
+            console.error(
+              'Failed to compute notifications for plugin ' + pluginName,
+              e,
+            );
+          }
         }
       }
     });