am 5460d126: Merge "Added AMessage::debugString() for debugging purposes." into gingerbread

Merge commit '5460d126f024a8d6597ce4eb127b51c101724960' into gingerbread-plus-aosp

* commit '5460d126f024a8d6597ce4eb127b51c101724960':
  Added AMessage::debugString() for debugging purposes.