IVGCVSW-6712 Move SubgraphView to backends include folder

 * Make subgraphview a public interface for backends.

Change-Id: I615a29ffec41e947215c3d29c2d7d214e327fb90
Signed-off-by: Francis Murtagh <francis.murtagh@arm.com>
diff --git a/include/armnn/backends/IBackendInternal.hpp b/include/armnn/backends/IBackendInternal.hpp
index 0756fdd..c64150a 100644
--- a/include/armnn/backends/IBackendInternal.hpp
+++ b/include/armnn/backends/IBackendInternal.hpp
@@ -10,12 +10,12 @@
 #include <armnn/Deprecated.hpp>
 
 #include <ISubgraphViewConverter.hpp>
-#include <SubgraphView.hpp>
 
 #include <armnn/backends/IBackendContext.hpp>
 #include <armnn/backends/IMemoryManager.hpp>
 #include <armnn/backends/ITensorHandleFactory.hpp>
 #include <armnn/backends/OptimizationViews.hpp>
+#include <armnn/backends/SubgraphView.hpp>
 #include <armnn/backends/profiling/IBackendProfiling.hpp>
 #include <armnn/backends/profiling/IBackendProfilingContext.hpp>