Merge "Add @TestApi to ActivityOptions.setLaunchStackId" into nyc-dev
am: 7d2a0a0571

* commit '7d2a0a05715841b582cbaefa3fd0e0a542064556':
  Add @TestApi to ActivityOptions.setLaunchStackId

Change-Id: I7996b43fa80b5965feb69028be2526faa379a134