netd: Add support for attaching/detaching PPP daemons

Signed-off-by: San Mehat <san@google.com>
diff --git a/ResponseCode.h b/ResponseCode.h
index 37f0008..6c1c238 100644
--- a/ResponseCode.h
+++ b/ResponseCode.h
@@ -25,6 +25,7 @@
     static const int InterfaceListResult       = 110;
     static const int TetherInterfaceListResult = 111;
     static const int TetherDnsFwdTgtListResult = 112;
+    static const int TtyListResult             = 113;
 
 
     // 200 series - Requested action has been successfully completed