MLCE-101: Adding dilation support in conv and dconv

Added support for dilation in DepthwiseConvolution2d in the
Neon and CL backends.

Change-Id: Ie1522b498c07f80d6efcf9dc79e926c8cfa06ca5
Signed-off-by: Pablo Tello <pablo.tello@arm.com>
diff --git a/src/backends/reference/RefLayerSupport.hpp b/src/backends/reference/RefLayerSupport.hpp
index 53a1abf..9b1a95c 100644
--- a/src/backends/reference/RefLayerSupport.hpp
+++ b/src/backends/reference/RefLayerSupport.hpp
@@ -74,6 +74,14 @@
                                          const DetectionPostProcessDescriptor& descriptor,
                                          Optional<std::string&> reasonIfUnsupported = EmptyOptional()) const override;
 
+    bool IsDilatedDepthwiseConvolutionSupported(const TensorInfo& input,
+                                                const TensorInfo& output,
+                                                const DepthwiseConvolution2dDescriptor& descriptor,
+                                                const TensorInfo& weights,
+                                                const Optional<TensorInfo>& biases,
+                                                Optional<std::string&> reasonIfUnsupported =
+                                                    EmptyOptional()) const override;
+
     bool IsDivisionSupported(const TensorInfo& input0,
                              const TensorInfo& input1,
                              const TensorInfo& output,