am 04c72b4: AI 148812: revise the AppWidget developer guide documentatio

Merge commit '04c72b47d877c9f3b45caa1ddc7f640b02e7be4c' into donut

* commit '04c72b47d877c9f3b45caa1ddc7f640b02e7be4c':
  AI 148812: revise the AppWidget developer guide documentation