CAM: implement basic camera functions with a blank camera

src/core/frontend/camera/interface.cpp

@@ -0,0 +1,11 @@
+// Copyright 2016 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/frontend/camera/interface.h"
+
+namespace Camera {
+
+CameraInterface::~CameraInterface() = default;
+
+} // namespace Camera