am 2b989e1f: am 0ac8ac30: Doc change: Add docs for licensing service.

Merge commit '2b989e1f7d08efd51652b56b1cb1fef76a1e8ab1' into gingerbread-plus-aosp

* commit '2b989e1f7d08efd51652b56b1cb1fef76a1e8ab1':
  Doc change: Add docs for licensing service.