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/class_linker.cc b/runtime/class_linker.cc
index 41adae4..1abff59 100644
--- a/runtime/class_linker.cc
+++ b/runtime/class_linker.cc
@@ -52,15 +52,15 @@
 #include "entrypoints/entrypoint_utils.h"
 #include "entrypoints/runtime_asm_entrypoints.h"
 #include "experimental_flags.h"
-#include "gc_root-inl.h"
 #include "gc/accounting/card_table-inl.h"
 #include "gc/accounting/heap_bitmap-inl.h"
 #include "gc/accounting/space_bitmap-inl.h"
-#include "gc/heap.h"
 #include "gc/heap-visit-objects-inl.h"
+#include "gc/heap.h"
 #include "gc/scoped_gc_critical_section.h"
 #include "gc/space/image_space.h"
 #include "gc/space/space-inl.h"
+#include "gc_root-inl.h"
 #include "handle_scope-inl.h"
 #include "image-inl.h"
 #include "imt_conflict_table.h"
@@ -75,37 +75,37 @@
 #include "leb128.h"
 #include "linear_alloc.h"
 #include "mirror/call_site.h"
-#include "mirror/class.h"
 #include "mirror/class-inl.h"
+#include "mirror/class.h"
 #include "mirror/class_ext.h"
 #include "mirror/class_loader.h"
-#include "mirror/dex_cache.h"
 #include "mirror/dex_cache-inl.h"
+#include "mirror/dex_cache.h"
 #include "mirror/emulated_stack_frame.h"
 #include "mirror/field.h"
 #include "mirror/iftable-inl.h"
 #include "mirror/method.h"
-#include "mirror/method_type.h"
 #include "mirror/method_handle_impl.h"
 #include "mirror/method_handles_lookup.h"
+#include "mirror/method_type.h"
 #include "mirror/object-inl.h"
-#include "mirror/object_array-inl.h"
 #include "mirror/object-refvisitor-inl.h"
+#include "mirror/object_array-inl.h"
 #include "mirror/proxy.h"
 #include "mirror/reference-inl.h"
 #include "mirror/stack_trace_element.h"
 #include "mirror/string-inl.h"
 #include "native/dalvik_system_DexFile.h"
+#include "nativehelper/ScopedLocalRef.h"
 #include "oat.h"
-#include "oat_file.h"
 #include "oat_file-inl.h"
+#include "oat_file.h"
 #include "oat_file_assistant.h"
 #include "oat_file_manager.h"
 #include "object_lock.h"
 #include "os.h"
 #include "runtime.h"
 #include "runtime_callbacks.h"
-#include "ScopedLocalRef.h"
 #include "scoped_thread_state_change-inl.h"
 #include "thread-inl.h"
 #include "thread_list.h"