Merge changes I5fe02059,Iea8bf298,I0630c302,Ifc4b8fe9,I29319bda

* changes:
  adb: bump the local socket backlog to the maximum.
  adb: fix unicode file path test.
  adb: delete vestigial SHELL_EXIT_NOTIFY_FD.
  adb: don't immediately close a socket when write fails.
  adb: make fdevent_run_on_main_thread's fd nonblocking.