adb: use asocket\\\\\\'s close function when closing. am: f71c01493a am: d179556680 am: e2a5846402 am: 29aa08f8cc  -s ours am: 2ca04650df
am: 46fedbc4b2

Change-Id: I1a8085be20b06af3ceda7c0187e9623d55566851