IVGCVSW-5504 'TfLiteDelegate: Introduce FP16 and BackendOptions'

* Added BackendOptions creations of armnn_delegate
* Included armnn/third-party the armnn_delegate unit tests
* Updated the CreateConstTensor function

Signed-off-by: Sadik Armagan <sadik.armagan@arm.com>
Change-Id: I8e2099a465766b905bff701413307e5850b68e42
diff --git a/delegate/src/armnn_delegate.cpp b/delegate/src/armnn_delegate.cpp
index 69bd4f7..3380c84 100644
--- a/delegate/src/armnn_delegate.cpp
+++ b/delegate/src/armnn_delegate.cpp
@@ -118,10 +118,15 @@
 {
     // Create ArmNN Runtime
     armnn::IRuntime::CreationOptions runtimeOptions;
+
+    auto backendOptions = m_Options.GetBackendOptions();
+    if (!backendOptions.empty())
+    {
+        runtimeOptions.m_BackendOptions = backendOptions;
+    }
     m_Runtime = armnn::IRuntime::Create(runtimeOptions);
 
     std::vector<armnn::BackendId> backends;
-
     if (m_Runtime)
     {
         const armnn::BackendIdSet supportedDevices = m_Runtime->GetDeviceSpec().GetSupportedBackends();