Introduce pluginKey

Summary: Exposed the `pluginKey` to sandy plugins (which we will use later for storing table preferences per plugin). And a little moving code around because circular deps problem roared its ugly head again.

Reviewed By: nikoant

Differential Revision: D27009721

fbshipit-source-id: 7ad29e72ff8028c9daae270c4749b657bd8ff049

desktop/app/src/devices/BaseDevice.tsx

@@ -242,6 +242,12 @@ export default class BaseDevice {
           _getFlipperLibImplementation(),
           plugin,
           this,
+          // break circular dep, one of those days again...
+          require('../utils/pluginUtils').getPluginKey(
+            undefined,
+            {serial: this.serial},
+            plugin.id,
+          ),
           initialState,
         ),
       );