Fix JDWP ObjectRegistry lock ordering.

Also make debugging lock ordering violations nicer by using our
LockLevel operator<<.

Change-Id: Ic15ebe70363a90a09f6491bd5c336a604e9d6c48
diff --git a/src/jdwp/jdwp_main.cc b/src/jdwp/jdwp_main.cc
index 4a18d48..4e738ff 100644
--- a/src/jdwp/jdwp_main.cc
+++ b/src/jdwp/jdwp_main.cc
@@ -416,13 +416,15 @@
       thread_->TransitionFromRunnableToSuspended(kWaitingInMainDebuggerLoop);
     }
 
-    /* release session state, e.g. remove breakpoint instructions */
     {
       ScopedObjectAccess soa(thread_);
+
+      // Release session state, e.g. remove breakpoint instructions.
       ResetState();
+
+      // Tell the rest of the runtime that the debugger is no longer around.
+      Dbg::Disconnected();
     }
-    /* tell the interpreter that the debugger is no longer around */
-    Dbg::Disconnected();
 
     /* if we had threads suspended, resume them now */
     Dbg::UndoDebuggerSuspensions();