ART: More header cleanups

Pull out more dependencies through forward declarations.

Test: m test-art-host
Change-Id: I7d86726928937f788b956ec9eac91532d66d57ae
diff --git a/runtime/art_method-inl.h b/runtime/art_method-inl.h
index 8567c00..d1afcb8 100644
--- a/runtime/art_method-inl.h
+++ b/runtime/art_method-inl.h
@@ -27,6 +27,7 @@
 #include "dex_file_annotations.h"
 #include "dex_file-inl.h"
 #include "gc_root-inl.h"
+#include "invoke_type.h"
 #include "jit/profiling_info.h"
 #include "mirror/class-inl.h"
 #include "mirror/dex_cache-inl.h"