- updates NetUtils to use new libnetutils headers

- updates WifiStateTracker to track net.XXX.dnsX properties for name servers
- removes dhcp from WifiNative (use NetworkUtils instead)

Change-Id: Ic69ff253e8784cad34e9291e7970ee38bfa235b9

core/jni/android_net_NetUtils.cpp

@@ -22,29 +22,8 @@
 #include <utils/Log.h>
 #include <arpa/inet.h>
 
-extern "C" {
-int ifc_enable(const char *ifname);
-int ifc_disable(const char *ifname);
-int ifc_add_host_route(const char *ifname, uint32_t addr);
-int ifc_remove_host_routes(const char *ifname);
-int ifc_set_default_route(const char *ifname, uint32_t gateway);
-int ifc_get_default_route(const char *ifname);
-int ifc_remove_default_route(const char *ifname);
-int ifc_reset_connections(const char *ifname);
-int ifc_configure(const char *ifname, in_addr_t ipaddr, in_addr_t netmask, in_addr_t gateway, in_addr_t dns1, in_addr_t dns2);
-
-int dhcp_do_request(const char *ifname,
-                    in_addr_t *ipaddr,
-                    in_addr_t *gateway,
-                    in_addr_t *mask,
-                    in_addr_t *dns1,
-                    in_addr_t *dns2,
-                    in_addr_t *server,
-                    uint32_t  *lease);
-int dhcp_stop(const char *ifname);
-int dhcp_release_lease(const char *ifname);
-char *dhcp_get_errmsg();
-}
+#include <netutils/ifc.h>
+#include <netutils/dhcp.h>
 
 #define NETUTILS_PKG_NAME "android/net/NetworkUtils"