IVGCVSW-4399 Create Sample Dynamic backend

 * Move IWorkload and WorkloadInfo to include/armnn/backends
 * Add simple sample dynamic backend with addition workload
 * Add sample example to run dynamic backend
 * Unit tests

Signed-off-by: Narumol Prangnawarat <narumol.prangnawarat@arm.com>
Change-Id: I0753ce35b8e8a6223a1471388b49246d82438a44
diff --git a/src/backends/backendsCommon/WorkloadInfo.hpp b/src/backends/backendsCommon/WorkloadInfo.hpp
index 304bc0b..cac147c 100644
--- a/src/backends/backendsCommon/WorkloadInfo.hpp
+++ b/src/backends/backendsCommon/WorkloadInfo.hpp
@@ -2,17 +2,8 @@
 // Copyright © 2017 Arm Ltd. All rights reserved.
 // SPDX-License-Identifier: MIT
 //
-#pragma once
 
-namespace armnn
-{
-
-/// Contains information about inputs and outputs to a layer.
-/// This is needed at construction of workloads, but are not stored.
-struct WorkloadInfo
-{
-    std::vector<TensorInfo> m_InputTensorInfos;
-    std::vector<TensorInfo> m_OutputTensorInfos;
-};
-
-} //namespace armnn
+// This file is depricated and will be removed soon.
+// Please use the new header in armnn/backends instead.
+// This will use the new armnn/backends header.
+#include <armnn/backends/WorkloadInfo.hpp>