am 2fd2d2f9: AI 149080: Change default PDK app engine version to 2

Merge commit '2fd2d2f90e66eca36141ee594b83ed57f5a39764' into donut

* commit '2fd2d2f90e66eca36141ee594b83ed57f5a39764':
  AI 149080: Change default PDK app engine version to 2