netd: Add support for interface idletimer netlink notifications.

Change-Id: Ifda5b8ecf68533eea42b133dbe0a581b4401ab11
diff --git a/NetlinkManager.h b/NetlinkManager.h
index c8f5507..6515ea4 100644
--- a/NetlinkManager.h
+++ b/NetlinkManager.h
@@ -32,9 +32,11 @@
     NetlinkHandler       *mUeventHandler;
     NetlinkHandler       *mRouteHandler;
     NetlinkHandler       *mQuotaHandler;
+    NetlinkHandler       *mIfaceIdleTimerHandler;
     int                  mUeventSock;
     int                  mRouteSock;
     int                  mQuotaSock;
+    int                  mIfaceIdleTimerSock;
 
 public:
     virtual ~NetlinkManager();
@@ -50,6 +52,9 @@
     /* This is the nflog group arg that the xt_quota2 neftiler will use. */
     static const int NFLOG_QUOTA_GROUP;
 
+    /* This is the group that the xt_IDLETIMER netfilter will use. */
+    static const int IDLETIMER_GROUP;
+
 private:
     NetlinkManager();
     NetlinkHandler* setupSocket(int *sock, int netlinkFamily, int groups,