Proof of concept for Android Metrics SDK, hooked up to the mobile app metrics server spike

What
Create a proof of concept Android Metrics SDK, hooked up to the mobile app metrics server spike

Why
To prove it is possible to:

• use the Android Core SDK when building a service SDK
• collect and visualise mobile app metrics data (sdk version, app version) from a mobile device

How
The mobile app metrics server spike is tracked in AEROGEAR-1894.
Write a service sdk that hooks up to the mobile apps metrics service in that task.