ART: Forward declarations for InvokeType

Use forward declarations in other header files.

Test: m
Change-Id: I8ef4492b6c48ff20d4d77d0516eacd362ed210bc
diff --git a/runtime/mirror/class.h b/runtime/mirror/class.h
index 4c9b146..c44b616 100644
--- a/runtime/mirror/class.h
+++ b/runtime/mirror/class.h
@@ -27,7 +27,6 @@
 #include "gc/allocator_type.h"
 #include "gc_root.h"
 #include "imtable.h"
-#include "invoke_type.h"
 #include "modifiers.h"
 #include "object.h"
 #include "object_array.h"
@@ -43,6 +42,7 @@
 class ArtMethod;
 struct ClassOffsets;
 template<class T> class Handle;
+enum InvokeType : uint32_t;
 template<typename T> class LengthPrefixedArray;
 template<typename T> class ArraySlice;
 class Signature;