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.
Cleaned up eglbringuptest code
- Refactored CEGLRendering construction to separate EGL and VG setup
- Consistently check EGL and VG errors after each API call
- Standardised RDebug::Printf statements to all start with [EBT]
- Removed unused libraries from MMP file
- Removed unused openvgengine.h
- Removed various unused member variables
- Removed unused CWsCanvas class