Converted return type for Unsupported Attribtue according to spec

Author: lpbeliveau-silabs

src/app/clusters/scenes-server/SceneHandlerImpl.cpp

@@ -40,12 +40,10 @@ Type ConvertDefaultValueToWorkingValue(const EmberAfDefaultAttributeValue & defa
     {
         return static_cast<Type>(defaultValue.defaultValue);
     }
-    else
-    {
-        Type sValue = 0;
-        memcpy(&sValue, defaultValue.ptrToDefaultValue, sizeof(Type));
-        return app::NumericAttributeTraits<Type>::StorageToWorking(sValue);
-    }
+
+    Type sValue = 0;
+    memcpy(&sValue, defaultValue.ptrToDefaultValue, sizeof(Type));
+    return app::NumericAttributeTraits<Type>::StorageToWorking(sValue);
 }
 
 /// CapAttributeID

src/app/clusters/scenes-server/scenes-server.cpp

@@ -71,6 +71,11 @@ CHIP_ERROR AddResponseOnError(CommandHandlerInterface::HandlerContext & ctx, Res
         {
             resp.status = to_underlying(Protocols::InteractionModel::Status::ResourceExhausted);
         }
+        else if (CHIP_IM_GLOBAL_STATUS(UnsupportedAttribute) == err)
+        {
+            // TODO: Confirm if we need to add UnsupportedAttribute status as a return for Scene Commands
+            resp.status = to_underlying(Protocols::InteractionModel::Status::InvalidCommand);
+        }
         else
         {
             resp.status = to_underlying(StatusIB(err).mStatus);