ART: Move to using locks.h instead of mutex.h

When only annotating lock requirements, use locks.h.

Bug: 119869270
Test: mmma art
Change-Id: I1608b03254712feff0072ebad012c3af0cc3dda4
diff --git a/runtime/fault_handler.h b/runtime/fault_handler.h
index 24ef0b1..d3be51f 100644
--- a/runtime/fault_handler.h
+++ b/runtime/fault_handler.h
@@ -23,7 +23,8 @@
 
 #include <vector>
 
-#include "base/mutex.h"  // For annotalysis.
+#include "base/globals.h"  // For CanDoImplicitNullCheckOn.
+#include "base/locks.h"  // For annotalysis.
 
 namespace art {