ART: Rename Handle hierarchy

Bring the names in line with normal OO principles: ConstHandle
becomes Handle, and Handle becomes MutableHandle.

Change-Id: I0f018eb7ba28bc422e3a23dd73a6cbe6fc2d2044
diff --git a/compiler/common_compiler_test.h b/compiler/common_compiler_test.h
index 4e74f0a..df06b71 100644
--- a/compiler/common_compiler_test.h
+++ b/compiler/common_compiler_test.h
@@ -63,11 +63,11 @@
 
   void CompileMethod(mirror::ArtMethod* method) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
-  void CompileDirectMethod(ConstHandle<mirror::ClassLoader> class_loader, const char* class_name,
+  void CompileDirectMethod(Handle<mirror::ClassLoader> class_loader, const char* class_name,
                            const char* method_name, const char* signature)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
-  void CompileVirtualMethod(ConstHandle<mirror::ClassLoader> class_loader, const char* class_name,
+  void CompileVirtualMethod(Handle<mirror::ClassLoader> class_loader, const char* class_name,
                             const char* method_name, const char* signature)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);