Merge changes I465804fd,Ib5a684bb,If5e66570,I8471cc00,I8ba0a70a

* changes:
  adb: convert fdevent over to unique_fd.
  adb: move towards using unique_fd.
  adb: delete FDEVENT_DONTCLOSE.
  adb: remove fdevent_install, fdevent_remove.
  adb: fix uninitialized variable in AsyncServiceRef.