am 9a8df805: am 1112632a: Merge "docs: revise javadocs for sip add a package description, revise class descriptions and edit some method docs" into gingerbread

* commit '9a8df8054b2e38a27d8e8e6b17365979218f0e3f':
  docs: revise javadocs for sip add a package description, revise class descriptions and edit some method docs