Fix broken test build

Change-Id: I767bcefd92899334e4769dd3495595f546133694
diff --git a/opengl/tests/EGLTest/EGL_test.cpp b/opengl/tests/EGLTest/EGL_test.cpp
index f6644fb..fea52f3 100644
--- a/opengl/tests/EGLTest/EGL_test.cpp
+++ b/opengl/tests/EGLTest/EGL_test.cpp
@@ -103,6 +103,7 @@
     struct DummyConsumer : public BnConsumerListener {
         virtual void onFrameAvailable() {}
         virtual void onBuffersReleased() {}
+        virtual void onSidebandStreamChanged() {}
     };
 
     // Create a EGLSurface