Merge "Add clarifying documentation to Context.BIND_EXTERNAL_SERVICE." into nyc-dev
am: f45bc095c6

* commit 'f45bc095c6cef916f5f801fb320b3413f0fc099a':
  Add clarifying documentation to Context.BIND_EXTERNAL_SERVICE.

Change-Id: I5306ff5f4e9abe6161616873e752cf4d54ed6408