Camera: Add unit test infrastructure for libcameraclient

Change-Id: I957538663ae8332d26f3640c63a75efc79f4ac5c
diff --git a/include/camera/Camera.h b/include/camera/Camera.h
index 43dae1c..8b87de6 100644
--- a/include/camera/Camera.h
+++ b/include/camera/Camera.h
@@ -159,7 +159,7 @@
         sp<Camera>         mCamera;
     };
 
-private:
+protected:
                         Camera();
                         Camera(const Camera&);
                         Camera& operator=(const Camera);