Unblockr has released an excellent app for android devices including shield/firestick/tv/phones.
All that is needed is an Unblockr vpn subscription and the app.
PLEASE NOTE...... If you are a NEW Unblockr vpn user you must click REGENERATE in your vpn folder once before entering your api key into the app.
Merely install your api key and select the country's vpn of your choice.
The api key is case sensitive and linked to your account..
Please note.. The Kodi diagnostic addon will NOT work while you are on VPN. It is for DNS only.