TME-25 Added one more w/s to stop "Tracking " again if  started already

Suppose first user started the tracking and other user still seeing the "Start Tracking" enabled. When any other user clicks on it first we will send the request to server asking whether any updates from last 7 minutes , if not then server will give response with one flag. 
 
Using the flag we will  allow user to start tracking and server will get updates from second person who is in CAB.