Make netd listen for and notify RDNSS options.

Bug: 9180552
Change-Id: Id2485b35c2299cfc455dd2b3b725136e5eb2a7e4
diff --git a/ResponseCode.h b/ResponseCode.h
index 46b842d..d8fafbb 100644
--- a/ResponseCode.h
+++ b/ResponseCode.h
@@ -76,5 +76,6 @@
     static const int ServiceGetAddrInfoSuccess      = 612;
     static const int InterfaceClassActivity         = 613;
     static const int InterfaceAddressChange         = 614;
+    static const int InterfaceDnsInfo               = 615;
 };
 #endif