Merge "Send neighbors into NUD_PROBE rather than NUD_DELAY" into mnc-dev

    public static boolean probeNeighbor(int ifIndex, InetAddress ip) {

        final long IO_TIMEOUT = 300L;

        final String msgSnippet = "probing ip=" + ip.getHostAddress() + "%" + ifIndex;

        // This currently does not cause neighbor probing if the target |ip|

        // has been confirmed reachable within the past "delay_probe_time"

        // seconds, i.e. within the past 5 seconds.

        //

        // TODO: replace with a transition directly to NUD_PROBE state once

        // kernels are updated to do so correctly.

        if (DBG) { Log.d(TAG, msgSnippet); }

        final byte[] msg = RtNetlinkNeighborMessage.newNewNeighborMessage(

                1, ip, StructNdMsg.NUD_DELAY, ifIndex, null);

                1, ip, StructNdMsg.NUD_PROBE, ifIndex, null);

        boolean returnValue = false;

        try (NetlinkSocket nlSocket = new NetlinkSocket(OsConstants.NETLINK_ROUTE)) {