IVGCVSW-2555 Add no-op implementation for Detection PostProcess

 * Added DetectionPostProcessQueueDescriptor to WorkloadData
 * Added CreateDetectionPostProcess function in WorkloadFactory.hpp
 * Added stub implementation of the CreateDetectionPostProcess
in workload factories
 * Added DetectionPostProcessLayer stub implementation
 * Added AddDetectionPostProcessLayer to Network
 * Added IsDetectionPostProcessSupported to LayerSupportBase

Change-Id: Ifc071b3b6b12877c997bdcc43d769c8f891d5c6c
diff --git a/src/armnn/Network.cpp b/src/armnn/Network.cpp
index f9ebad2..662a9cc 100644
--- a/src/armnn/Network.cpp
+++ b/src/armnn/Network.cpp
@@ -594,6 +594,12 @@
     return AddDepthwiseConvolution2dLayerImpl(convolution2dDescriptor, weights, &biases, name);
 }
 
+IConnectableLayer* Network::AddDetectionPostProcessLayer(const armnn::DetectionPostProcessDescriptor& descriptor,
+                                                         const char* name)
+{
+    return m_Graph->AddLayer<DetectionPostProcessLayer>(descriptor, name);
+}
+
 IConnectableLayer* Network::AddPermuteLayer(const PermuteDescriptor& permuteDescriptor,
                                             const char* name)
 {