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/openjdkjvmti/ti_search.cc b/runtime/openjdkjvmti/ti_search.cc
index 6e0196e..50a01fc 100644
--- a/runtime/openjdkjvmti/ti_search.cc
+++ b/runtime/openjdkjvmti/ti_search.cc
@@ -43,14 +43,14 @@
 #include "mirror/class-inl.h"
 #include "mirror/object.h"
 #include "mirror/string.h"
+#include "nativehelper/ScopedLocalRef.h"
 #include "obj_ptr-inl.h"
 #include "runtime.h"
 #include "runtime_callbacks.h"
 #include "scoped_thread_state_change-inl.h"
-#include "ScopedLocalRef.h"
-#include "ti_phase.h"
 #include "thread-current-inl.h"
 #include "thread_list.h"
+#include "ti_phase.h"
 #include "well_known_classes.h"
 
 namespace openjdkjvmti {