IVGCVSW-4209 Create a public API for the ArmNN Utils

 * Moved the relevant armnnUtils headers to the new location:
   include/armnnUtils
 * Update the header usage throughout the source code

!android-nn-driver:2387

Signed-off-by: Matteo Martincigh <matteo.martincigh@arm.com>
Change-Id: I2ba15cebcacafad2b5a1a7b9c3312ffc585e09d6
diff --git a/src/armnnUtils/Permute.cpp b/src/armnnUtils/Permute.cpp
index 24a8286..a758bd9 100644
--- a/src/armnnUtils/Permute.cpp
+++ b/src/armnnUtils/Permute.cpp
@@ -3,10 +3,11 @@
 // SPDX-License-Identifier: MIT
 //
 
-#include "Permute.hpp"
+#include <armnn/Tensor.hpp>
+
+#include <armnnUtils/Permute.hpp>
 
 #include "Half.hpp"
-#include <armnn/Tensor.hpp>
 
 #include <cassert>
 #include <cstring>