Change to improve purging of orphaned segments from raw db.

SmsBroadcastUndelivered used to discard orphaned segments older than
30 days which seems too long, changing that to 7 days here.

In addition, the main change is to discard messages older than 1 day
but for that we make sure we check for 1 day of in-service so that
the device has had a chance to receive remaining message segment(s).

Test: manual
Bug: 111449999
Merged-in: Icc6174cf6e597d89d46547105b51c53e9f75206e
Change-Id: Icc6174cf6e597d89d46547105b51c53e9f75206e