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/native/dalvik_system_DexFile.cc b/runtime/native/dalvik_system_DexFile.cc
index ad00966..f6a8360 100644
--- a/runtime/native/dalvik_system_DexFile.cc
+++ b/runtime/native/dalvik_system_DexFile.cc
@@ -19,7 +19,6 @@
 #include <sstream>
 
 #include "android-base/stringprintf.h"
-#include "nativehelper/jni_macros.h"
 
 #include "base/logging.h"
 #include "base/stl_util.h"
@@ -32,14 +31,15 @@
 #include "mirror/object-inl.h"
 #include "mirror/string.h"
 #include "native_util.h"
+#include "nativehelper/jni_macros.h"
+#include "nativehelper/ScopedLocalRef.h"
+#include "nativehelper/ScopedUtfChars.h"
 #include "oat_file.h"
 #include "oat_file_assistant.h"
 #include "oat_file_manager.h"
 #include "os.h"
 #include "runtime.h"
 #include "scoped_thread_state_change-inl.h"
-#include "ScopedLocalRef.h"
-#include "ScopedUtfChars.h"
 #include "utils.h"
 #include "well_known_classes.h"
 #include "zip_archive.h"