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/Fill.hpp b/delegate/opaque/src/Fill.hpp
index a8cdf3a..fe27255 100644
--- a/delegate/opaque/src/Fill.hpp
+++ b/delegate/opaque/src/Fill.hpp
@@ -112,7 +112,8 @@
             return isSupported ? kTfLiteOk : kTfLiteError;
         }
 
-        armnn::IConnectableLayer* layer = delegateData.m_Network->AddFillLayer(descriptor);
+        auto layerName = GetName(armnn::LayerType::Fill, nodeIndex);
+        armnn::IConnectableLayer* layer = delegateData.m_Network->AddFillLayer(descriptor, layerName.c_str());
         layer->SetBackendId(setBackend);
         ARMNN_ASSERT(layer != nullptr);
 
@@ -122,7 +123,8 @@
         auto inputsTensorsProcess = ProcessInputs(layer,
                                                   delegateData,
                                                   tfLiteContext,
-                                                  tfLiteNode);
+                                                  tfLiteNode,
+                                                  nodeIndex);
         if (inputsTensorsProcess == kTfLiteError)
         {
             return inputsTensorsProcess;