DO NOT MERGE: adb: use asocket's close function when closing.

close_all_sockets was assuming that all registered local sockets used
local_socket_close as their close function. However, this is not true
for JDWP sockets.

Backport of 53eb31d8 and 9b587dec.

Bug: http://b/28347842
Change-Id: I13ec6fd87a0691c72608baf6038adcc0f03dca9f