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/backends/backendsCommon/WorkloadFactory.hpp b/src/backends/backendsCommon/WorkloadFactory.hpp
index dd47dd6..8883349 100644
--- a/src/backends/backendsCommon/WorkloadFactory.hpp
+++ b/src/backends/backendsCommon/WorkloadFactory.hpp
@@ -79,6 +79,9 @@
     virtual std::unique_ptr<IWorkload> CreateDepthwiseConvolution2d(
         const DepthwiseConvolution2dQueueDescriptor& descriptor, const WorkloadInfo& info) const = 0;
 
+    virtual std::unique_ptr<IWorkload> CreateDetectionPostProcess(
+        const DetectionPostProcessQueueDescriptor& descriptor, const WorkloadInfo& info) const = 0;
+
     virtual std::unique_ptr<IWorkload> CreateNormalization(const NormalizationQueueDescriptor& descriptor,
                                                            const WorkloadInfo&                 info) const = 0;