Remove verification for DownloadReceiver when failure

When the ACTION_DOWNLOAD_RESULT_INTERNAL intent is received
with a failure result, don't require that extras exist
in the receiver.

Test: Manual, Testapps
Bug: 67112896
Merged-In: I9ce32afc0c6e99b0a61e05a2d2b65855f054abd9
Change-Id: I9ac43a33aff88755cbc804890ce230743195f44d