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/jdwp/jdwp.h b/runtime/jdwp/jdwp.h
index 010a207..a1657d0 100644
--- a/runtime/jdwp/jdwp.h
+++ b/runtime/jdwp/jdwp.h
@@ -32,7 +32,7 @@
 
 namespace art {
 namespace mirror {
-class AbstractMethod;
+  class ArtMethod;
 }  // namespace mirror
 class Thread;