NNXSW-3081 Move Filesystem.hpp and Threads.hpp to public include

!android-nn-driver:5966

Change-Id: Ice0b4d2872bb0e09bfc0763034a206c3a8f24af4
Signed-off-by: Rob Hughes <robert.hughes@arm.com>
diff --git a/tests/NetworkExecutionUtils/NetworkExecutionUtils.cpp b/tests/NetworkExecutionUtils/NetworkExecutionUtils.cpp
index e5da149..23b892f 100644
--- a/tests/NetworkExecutionUtils/NetworkExecutionUtils.cpp
+++ b/tests/NetworkExecutionUtils/NetworkExecutionUtils.cpp
@@ -5,7 +5,7 @@
 
 #include "NetworkExecutionUtils.hpp"
 
-#include <Filesystem.hpp>
+#include <armnnUtils/Filesystem.hpp>
 #include <InferenceTest.hpp>
 #include <ResolveType.hpp>