Android: Add usage statistics to android.

Added an option in General config to enable/disable usage statistics. Added a popup on first open if
the user would like to engage in reporting. Clicking cancel or out of the box opts out. Only
clicking 'Ok' will enable reporting. Also added a new android specific values to report.

Source/Core/Common/Analytics.cpp

@@ -190,5 +190,4 @@ void HttpAnalyticsBackend::Send(std::string report)
   if (m_http.IsValid())
     m_http.Post(m_endpoint, report);
 }
-
 }  // namespace Common