ART: Clean up art_method.h

Clean up the header. Fix up other headers including the -inl file,
in an effort to prune the include graph. Fix broken transitive
includes by making includes explicit. Introduce new -inl files
for method handles and reference visiting.

Test: source build/envsetup.sh && lunch aosp_angler-userdebug && mmma art
Test: source build/envsetup.sh && lunch aosp_mips64-userdebug && mmma art
Change-Id: I8f60f1160c2a702fdf3598149dae38f6fa6bc851
diff --git a/runtime/native/java_lang_Class.cc b/runtime/native/java_lang_Class.cc
index 381dc7b..4f99947 100644
--- a/runtime/native/java_lang_Class.cc
+++ b/runtime/native/java_lang_Class.cc
@@ -19,8 +19,9 @@
 #include <iostream>
 
 #include "art_field-inl.h"
+#include "art_method-inl.h"
 #include "base/enums.h"
-#include "class_linker.h"
+#include "class_linker-inl.h"
 #include "common_throws.h"
 #include "dex_file-inl.h"
 #include "dex_file_annotations.h"