[automerger] Remove "public" download feature. am: 35e123117b am: 52b9a670b8 am: 7f0b5c44c8 am: 3439b74e4a am: b2db30a21e am: 84cefc516e am: 32a92d0a73 am: 9c2867c8a1
am: 10cde68480

Change-Id: Ie9ded12d3c24ae3095854644105e8f658c2aa182