Merge "Merge "Merge "Update samples for new DownloadRequest API" am: 10f4fb6469" into stage-aosp-master am: 936cf912c4" into oc-dev-plus-aosp am: 083d0e73d6
am: ebbf6cba99

Change-Id: I6f83b2ff04b6ffd193224cf090b7003e2bb8b1c4