Scan completed downloads when requested.

The recent JobScheduler rewrite means we no longer spin up a service
when insterting an already-completed download.  However, the calling
app may have requested the download to be scanned, so kick off a
scan request for them.

Bug: 28659693
Change-Id: I497e10995ba04f1522fe8d7e547ebea6e305f6e9
2 files changed