Fix idletimer iptable rules.

Now idletimer should be triggered by every packet.

Change-Id: I8cc7c40ed9eb71ff6e7627ee9482c7e228d80f38
diff --git a/IdletimerController.h b/IdletimerController.h
index 2af0d9b..eb2aa35 100644
--- a/IdletimerController.h
+++ b/IdletimerController.h
@@ -30,8 +30,8 @@
                                  const char *classLabel);
     bool setupIptablesHooks();
 
-    static const char* LOCAL_NAT_PREROUTING;
-    static const char* LOCAL_NAT_POSTROUTING;
+    static const char* LOCAL_RAW_PREROUTING;
+    static const char* LOCAL_MANGLE_POSTROUTING;
 
  private:
     enum IptOp { IptOpAdd, IptOpDelete };