Basic flipper plugin to record intents

Summary:
The plugin is inteded to record intents being dispatched and handled
Current version is pretty simple and just records the intents correctly handled by IG app only (for now, integration is simple enough to add to FB, too)
Plugin prints the data associated with the target

Differential Revision: D43494264

fbshipit-source-id: 3e3cd41ade1d083990d15b3c2eb815db157c7163

desktop/static/icons.json

@@ -661,5 +661,8 @@
   ],
   "phone": [
     16
+  ],
+  "app-horizon-assets": [
+    16
   ]
 }