1: startService -------stopService (this will call onDestroy)

2: bindService -------unbindService    (this will call onDestroy)

3: startService---bindService----stopService (nothing happen,  shoud call unbindService)

4: startService---bindService----unbundService --- stopService (this will call onDestroy)

5: startService---bindService----stopService-----unbindService  (this will call onDestroy)

6: bindService---startService---stopService (nothing happen,  shoud call unbindService)

7: bindService---startService---unbindService----stopService  (this will call onDestroy)

7: bindService---startService----stopService---unbindService  (this will call onDestroy)