Add link to Convoy Android app to showcase

Summary:
Adding a link to the Convoy Driver Android app to the showcase
Closes #11830

Differential Revision: D4427024

Pulled By: hramos

fbshipit-source-id: 641ed9c4dce3b69d141a9328f41ce04ea1cd049c

website/src/react-native/showcase.js

@@ -139,6 +139,7 @@ var featured = [
     name: 'Convoy Driver',
     icon: 'http://a1.mzstatic.com/us/r30/Purple30/v4/5a/74/56/5a74567d-4491-a298-65cd-722c8a7211ac/icon175x175.png',
     linkAppStore: 'https://itunes.apple.com/us/app/convoy-driver/id1045368390?mt=8',
+    linkPlayStore: 'https://play.google.com/store/apps/details?id=com.convoy.driver',
     infoLink: 'http://www.theverge.com/2015/10/27/9620352/convoy-uber-for-trucking',
     infoTitle: 'Convoy, a Seattle-based "Uber for trucking"',
   },