Refactor java.lang.reflect implementation

Cherry-picked from commit ed41d5c44299ec5d44b8514f6e17f802f48094d1.

Move to ArtMethod/Field instead of AbstractMethod/Field and have
java.lang.reflect APIs delegate to ArtMethod/ArtField.

Bug: 10014286.

Change-Id: Iafc1d8c5b62562c9af8fb9fd8c5e1d61270536e7
diff --git a/runtime/mirror/object.h b/runtime/mirror/object.h
index a40c906..28a91dd 100644
--- a/runtime/mirror/object.h
+++ b/runtime/mirror/object.h
@@ -31,10 +31,10 @@
 
 namespace mirror {
 
-class AbstractMethod;
+class ArtField;
+class ArtMethod;
 class Array;
 class Class;
-class Field;
 template<class T> class ObjectArray;
 template<class T> class PrimitiveArray;
 typedef PrimitiveArray<uint8_t> BooleanArray;
@@ -144,17 +144,17 @@
 
   Throwable* AsThrowable() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
-  bool IsMethod() const;
+  bool IsArtMethod() const;
 
-  AbstractMethod* AsMethod();
+  ArtMethod* AsArtMethod();
 
-  const AbstractMethod* AsMethod() const;
+  const ArtMethod* AsArtMethod() const;
 
-  bool IsField() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+  bool IsArtField() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
-  Field* AsField() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+  ArtField* AsArtField() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
-  const Field* AsField() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+  const ArtField* AsArtField() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
   bool IsReferenceInstance() const;