It is possible that the adb server on host has many sockets in
CLOSE_WAIT state. To prevent socket leak, always enable POLLRDHUP
in fdevent.cpp to detect sockets in CLOSE_WAIT state.
Update LocalSocketTest unit tests:
Change half_close_with_packet to read_from_closing_socket, as reading
from a SHUT_WR socket is not needed in adb.
Change close_with_no_events_installed to close_socket_in_CLOSE_WAIT_state,
as the latter is more close to the real situation in use.
Bug: 23314034
Change-Id: Ice4f4036624e5584eab6ba5848e7f169c92f037f
Add has_write_error flag in asocket, so it will not wait on local_socket_closing_list
to write pending packets in local_socket_close(). Although it doesn't fix any problem,
it helps to make the code more stable.
Add a missing put_apacket() in error handling.
Add a check when adding local socket in local_socket_closing_list.
Bug: 23314034
Change-Id: I75b07ba8ee59b7f277fba2fb919db63065b291be
