Merge "adb: check return value of register_socket_transport." am: 3d981c87c9
am: 1a78ec8f65

* commit '1a78ec8f6525e7101cb8f7d75f42955bbdbbd98e':
  adb: check return value of register_socket_transport.

Change-Id: I94be64825d5908d52d930125808f431fd6b96503