HG-110 Custom smart banner

https://wikia-inc.atlassian.net/browse/HG-110
https://wikia-inc.atlassian.net/browse/HG-215

Related to https://github.com/Wikia/app/pull/5385
You can override the Play Store with it's Chrome Page sister in Android (sometimes an intent asks if you want to use native app or webpage for store and you can make this choice permanent by ticking the checkbox). I'm using Play Store as a web page since the native one doesn't work on wi-fi, just saying ;)