IVGCVSW-6509 Front End + Reference Workload implementation

Subtask of story: IVGCVSW-6164 Add a Pooling3d FrontEnd and Ref Implementation

* Add front end
* Add reference workload
* Add corresponding unit tests

Change-Id: Icce4146dd0a06a1da46a2def00a82d343e171750
Signed-off-by: Tamas Nyiri <tamas.nyiri@arm.com>
diff --git a/src/armnn/Network.cpp b/src/armnn/Network.cpp
index 17a1da1..d3a7f97 100644
--- a/src/armnn/Network.cpp
+++ b/src/armnn/Network.cpp
@@ -208,6 +208,12 @@
     return pNetworkImpl->AddPooling2dLayer(pooling2dDescriptor, name);
 }
 
+IConnectableLayer* INetwork::AddPooling3dLayer(const Pooling3dDescriptor& pooling3dDescriptor,
+                                               const char* name)
+{
+    return pNetworkImpl->AddPooling3dLayer(pooling3dDescriptor, name);
+}
+
 IConnectableLayer* INetwork::AddActivationLayer(const ActivationDescriptor& activationDescriptor,
                                                 const char* name)
 {
@@ -2033,6 +2039,12 @@
     return m_Graph->AddLayer<Pooling2dLayer>(pooling2dDescriptor, name);
 }
 
+IConnectableLayer* NetworkImpl::AddPooling3dLayer(const Pooling3dDescriptor& pooling3dDescriptor,
+    const char* name)
+{
+    return m_Graph->AddLayer<Pooling3dLayer>(pooling3dDescriptor, name);
+}
+
 IConnectableLayer* NetworkImpl::AddActivationLayer(const ActivationDescriptor& activationDescriptor,
     const char* name)
 {