am 591908fd: am 120a58fb: Extend unit test framework for Wifi soft AP configuration Add test case: testApSsidWithAlphabet

Merge commit '591908fd3fd1a84303bbc76c5c44d5cb0ee0bc94'

* commit '591908fd3fd1a84303bbc76c5c44d5cb0ee0bc94':
  Extend unit test framework for Wifi soft AP configuration