IVGCVSW-1814 - Add ConvertMean functionality to HalPolicy

Change-Id: I04b6150bb490a25fa7bf2da68c339ca5f1fe75de
diff --git a/1.1/HalPolicy.hpp b/1.1/HalPolicy.hpp
index 3b7fe54..dc3332c 100644
--- a/1.1/HalPolicy.hpp
+++ b/1.1/HalPolicy.hpp
@@ -27,6 +27,7 @@
 private:
     static bool ConvertDiv(const Operation& operation, const Model& model, ConversionData& data);
     static bool ConvertSub(const Operation& operation, const Model& model, ConversionData& data);
+    static bool ConvertMean(const Operation& operation, const Model& model, ConversionData& data);
 };
 
 } // namespace hal_1_1