IVGCVSW-1813 - Add MeanLayer
 * add MeanLayer functionalities
 * modify MeanQueueDescriptor to use parameter
 * add IsMeanSupported placeholder for all backends

Change-Id: Ic69a34a61df667849977aad9b38f9a01eef565b5
diff --git a/src/armnn/backends/RefLayerSupport.cpp b/src/armnn/backends/RefLayerSupport.cpp
index 41f57f1..d56cdeb 100644
--- a/src/armnn/backends/RefLayerSupport.cpp
+++ b/src/armnn/backends/RefLayerSupport.cpp
@@ -387,4 +387,12 @@
                                           &FalseFuncU8<>));
 }
 
+bool IsMeanSupportedRef(const TensorInfo& input,
+                        const TensorInfo& output,
+                        const MeanDescriptor& descriptor,
+                        std::string* reasonIfUnsupported)
+{
+    return false;
+}
+
 }