Issue #1739 Fix for PreparingDeviceSettings not being called.

This PR includes the removal of a duplicate GraphicsDeviceInformation file reference for android, creating the true public ctor on GraphicsDevice and adding the invocation of PrepareDeviceSettings from the GraphicsDeviceManager.Initialize method. This will ensure that a game can override the presentation parameters that are defaulted in MonoGame. Depends on #1738 to correctly implement preserve contents on the back buffer.