Remove object_utils.h.

Break into object_lock, field_helper and method_helper.
Clean up header files following this.
Also tidy some of the Handle code in response to compiler errors when resolving
the changes in this CL.

Change-Id: I73e63015a0f02a754d0866bfaf58208aebcaa295
diff --git a/runtime/fault_handler.cc b/runtime/fault_handler.cc
index 3112bc0..b4355ca 100644
--- a/runtime/fault_handler.cc
+++ b/runtime/fault_handler.cc
@@ -15,23 +15,16 @@
  */
 
 #include "fault_handler.h"
+
 #include <sys/mman.h>
 #include <sys/ucontext.h>
-#include "base/macros.h"
-#include "globals.h"
-#include "base/logging.h"
-#include "base/hex_dump.h"
-#include "thread.h"
-#include "mirror/art_method-inl.h"
-#include "mirror/class-inl.h"
-#include "mirror/dex_cache.h"
-#include "mirror/object_array-inl.h"
-#include "mirror/object-inl.h"
-#include "object_utils.h"
-#include "scoped_thread_state_change.h"
+
+#include "mirror/art_method.h"
+#include "mirror/class.h"
 #ifdef HAVE_ANDROID_OS
 #include "sigchain.h"
 #endif
+#include "thread-inl.h"
 #include "verify_object-inl.h"
 
 namespace art {