Update HeartBeatTask.java

[h27279392]

Fixed heartbeat failed not working and default no boundary.

        switch (lifecycleEvent.getType()) {
            case FAILED_SERVER_HEARTBEAT:

                if(failed_heartbeat_times.incrementAndGet() >= 3) {
                    toast("Stomp failed server heartbeat");
                    ...
                }

            break;
        }

[pazabel]

@NaikSoftware Hi. Can you please merge all these pull requests?