Add a class lable parameter to idletimer.

Now the idletimer should be setup by this command:
ndc idletimer add <interface> <timeout> <class label>

Class label can be a number or string to identify device type, such as
mobile or wifi. Idletimer will send label in the netd message instead
of the actual interface name.

Change-Id: Ic8b69dc5e38a4436c74723697905643a1214aa2a
diff --git a/ResponseCode.h b/ResponseCode.h
index 5bebb0f..8ae3d91 100644
--- a/ResponseCode.h
+++ b/ResponseCode.h
@@ -72,7 +72,7 @@
     static const int ServiceSetHostnameSuccess      = 610;
     static const int ServiceGetAddrInfoFailed       = 611;
     static const int ServiceGetAddrInfoSuccess      = 612;
-    static const int InterfaceActive                = 613;
-    static const int InterfaceIdle                  = 614;
+    static const int InterfaceClassActive           = 613;
+    static const int InterfaceClassIdle             = 614;
 };
 #endif