Added WSERV event handler to eglbringuptest
This change adds an active object which listens for WSERV events
on the application view window. A pointer event causes the
application to be terminated.
This change means that the timer which was previously used to end
execution after a preset duration has been removed.
Refactored eglbringuptest to separate EGL and VG code
This allows for a more complex demo (e.g. one which includes
animated rendering) to be implemented simply by writing a new
class derived from CEglRendering, and modifying CWsApp::ConstructL
to create an instance of this new class.