metamask - subscribe metamask store to keyringController substate

app/scripts/metamask-controller.js

@@ -98,6 +98,9 @@ module.exports = class MetamaskController extends EventEmitter {
     this.ethStore.on('update', this.sendUpdate.bind(this))
     this.keyringController.on('update', this.sendUpdate.bind(this))
     this.txManager.on('update', this.sendUpdate.bind(this))
+    this.keyringController.store.subscribe((state) => {
+      this.store.updateState({ KeyringController: state })
+    })
   }
 
   //