Don't query ChooserTargetService apps that haven't been used recently

Resolver/ChooserActivity sort apps based on usage factors for the last
two weeks. A score of zero means no usage data within that timeframe.
For system health and UI relevance, don't bother even waking up apps
that have zero scores.

Bug 25126166

Change-Id: Iae34a9667eb1985d6fe986670f3fb3f1177576da