Pass the correct renderer to EGLImageFactory

We should be using the EGL renderer's colorspace and color range
rather than the backend renderer's for fallbacks. The former is
what actually gets passed to the host PC during stream init.

app/streaming/video/ffmpeg-renderers/renderer.h

@@ -508,7 +508,8 @@ public:
         return AV_PIX_FMT_NONE;
     }
 
-    virtual bool initializeEGL(EGLDisplay,
+    virtual bool initializeEGL(IFFmpegRenderer*,
+                               EGLDisplay,
                                const EGLExtensions &) {
         return false;
     }