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

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

Change-Id: I51b1329b14754fa9f765452769a4e311a69ae6bb