ENYO-3029: Android SDK version is selected from a picker 

Project Properties > Android drawer : the UI used to define the Android min & max SDK version is changed from an input to a picker.
When the mouse hover on a picker item, a tool tip is shown to display the Android version associated to the SDK version.

Tested on Chrome Canary (Windows 7)
Enyo-DCO-1.1-Signed-off-by: Rafik Adiche mahmoud-rafik.adiche@hp.com