Merge "adb: check return value of register_socket_transport." am: 3d981c87c9 am: 1a78ec8f65
am: bb89e7e6b5

* commit 'bb89e7e6b5403297689f62b8f86d7a3cbab4037e':
  adb: check return value of register_socket_transport.

Change-Id: I7394d2fc85fd49f846ae96affc78a83601db9bc0