Only get apps with permission granted.

The subtitle gives the number of apps that can access location, but it
currently collects all apps that request location, including those
that are denied.  Ensure that we only count granted apps.

Bug: 129296799
Test: Open Settings, see the count is much lower.
Change-Id: I9a18bbb62be742731205dab9f5b8e9a703ea030c