Propagate 'this_object' for method unwind event.

Propagates the 'this_object' to InstrumentationListener::MethodUnwind callback.

Change-Id: I12561f1a611b8399b94e669f9b8a6eaaf1a58631
diff --git a/runtime/instrumentation.cc b/runtime/instrumentation.cc
index 0f4fa4e..2ff3c8d 100644
--- a/runtime/instrumentation.cc
+++ b/runtime/instrumentation.cc
@@ -501,7 +501,7 @@
                                         uint32_t dex_pc) const {
   if (have_method_unwind_listeners_) {
     for (InstrumentationListener* listener : method_unwind_listeners_) {
-      listener->MethodUnwind(thread, method, dex_pc);
+      listener->MethodUnwind(thread, this_object, method, dex_pc);
     }
   }
 }