MLCE-1092 Added layerNames to opaque delegate

 * All layers added through the opaque delegate will have a name that
   includes the nodeIndex from the tflite model.
 * Added utilities to OpaqueDelegateUtils to get the names for the layers.

Signed-off-by: Mike Kelly <mike.kelly@arm.com>
Change-Id: Iadcc21646d0b6fcc2c524d6239211ad3af6b6577
diff --git a/delegate/opaque/src/Pad.hpp b/delegate/opaque/src/Pad.hpp
index 112e7bb..4305224 100644
--- a/delegate/opaque/src/Pad.hpp
+++ b/delegate/opaque/src/Pad.hpp
@@ -182,7 +182,8 @@
         return isSupported ? kTfLiteOk : kTfLiteError;
     }
 
-    armnn::IConnectableLayer* padLayer = delegateData.m_Network->AddPadLayer(descriptor);
+    auto layerName = GetName(armnn::LayerType::Pad, nodeIndex);
+    armnn::IConnectableLayer* padLayer = delegateData.m_Network->AddPadLayer(descriptor, layerName.c_str());
     padLayer->SetBackendId(setBackend);
     ARMNN_ASSERT(padLayer != nullptr);