Make netd listen for and notify RDNSS options.

Bug: 9180552
Change-Id: Id2485b35c2299cfc455dd2b3b725136e5eb2a7e4
diff --git a/NetlinkHandler.h b/NetlinkHandler.h
index c0396c0..94b7282 100644
--- a/NetlinkHandler.h
+++ b/NetlinkHandler.h
@@ -42,5 +42,8 @@
     void notifyInterfaceClassActivity(const char *name, bool isActive);
     void notifyAddressChanged(int action, const char *addr, const char *iface,
                               const char *flags, const char *scope);
+    void notifyInterfaceDnsServers(const char *iface, const char *lifetime,
+                                   const char *servers);
+
 };
 #endif