art: use proper nativehelper headers

libnativeheader exports headers under nativeheader. These were
available before incorrectly as global headers in order to give
access to jni.h.

Test: modules using art find headers
Bug: 63762847
Change-Id: I5c820d677e94e07b2859e78610bc997fe51b41dc
diff --git a/runtime/interpreter/interpreter.cc b/runtime/interpreter/interpreter.cc
index 85cf73b..9cb74f7 100644
--- a/runtime/interpreter/interpreter.cc
+++ b/runtime/interpreter/interpreter.cc
@@ -27,8 +27,8 @@
 #include "jvalue-inl.h"
 #include "mirror/string-inl.h"
 #include "mterp/mterp.h"
+#include "nativehelper/ScopedLocalRef.h"
 #include "scoped_thread_state_change-inl.h"
-#include "ScopedLocalRef.h"
 #include "stack.h"
 #include "thread-inl.h"
 #include "unstarted_runtime.h"