Move mirror::ArtMethod to native

Optimizing + quick tests are passing, devices boot.

TODO: Test and fix bugs in mips64.

Saves 16 bytes per most ArtMethod, 7.5MB reduction in system PSS.
Some of the savings are from removal of virtual methods and direct
methods object arrays.

Bug: 19264997
Change-Id: I622469a0cfa0e7082a2119f3d6a9491eb61e3f3d
diff --git a/runtime/jdwp/jdwp.h b/runtime/jdwp/jdwp.h
index 55441c9..e18d10f 100644
--- a/runtime/jdwp/jdwp.h
+++ b/runtime/jdwp/jdwp.h
@@ -34,11 +34,11 @@
 namespace art {
 
 class ArtField;
+class ArtMethod;
 union JValue;
 class Thread;
 
 namespace mirror {
-  class ArtMethod;
   class Class;
   class Object;
   class Throwable;
@@ -74,7 +74,7 @@
 static inline void expandBufAddFrameId(ExpandBuf* pReply, FrameId id) { expandBufAdd8BE(pReply, id); }
 
 struct EventLocation {
-  mirror::ArtMethod* method;
+  ArtMethod* method;
   uint32_t dex_pc;
 };