Notify network observers of route changes.

This reverts commit 20d3f5e856a38ef22851e32d7f9b6a7cd02eb459.

Bug: 9180552
Change-Id: I004448e2f0c731f6ca2c6d3535dc4dd51a622293
diff --git a/server/NetlinkHandler.h b/server/NetlinkHandler.h
index a5c5b6b..83baa2b 100644
--- a/server/NetlinkHandler.h
+++ b/server/NetlinkHandler.h
@@ -45,6 +45,6 @@
                               const char *flags, const char *scope);
     void notifyInterfaceDnsServers(const char *iface, const char *lifetime,
                                    const char *servers);
-
+    void notifyRouteChange(int action, const char *route, const char *gateway, const char *iface);
 };
 #endif