adb: use asocket\\\\\\'s close function when closing. am: f71c01493a am: d179556680 am: e2a5846402 am: 29aa08f8cc  -s ours am: 2ca04650df
am: ddf5451df0

Change-Id: Iad9456e8d7ee2a2c446e74a605903a7e525bd646