title: Start service on installation of app without any activity
body: <p>Is it possible to directly start a service without any activity. by making a service a launcher. I want to start service repeatedly at the interval of 2 min. can I use alarm. 
         At present I have an activity that starts an alarm using this
                manager.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
          SystemClock.elapsedRealtime(), duration, loggerIntent);
   that starts service at every 2 min. How can I remove this activity.</p>