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/method_handles.cc b/runtime/method_handles.cc
index b6f8a17..54d45b1 100644
--- a/runtime/method_handles.cc
+++ b/runtime/method_handles.cc
@@ -22,7 +22,7 @@
 #include "jvalue.h"
 #include "jvalue-inl.h"
 #include "mirror/emulated_stack_frame.h"
-#include "mirror/method_handle_impl.h"
+#include "mirror/method_handle_impl-inl.h"
 #include "mirror/method_type.h"
 #include "reflection.h"
 #include "reflection-inl.h"