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: I1f98db4bc2761425837886736d0dcf2f7ad5dcd7