Ensure we show counts on the permission filter dialog.

When filtering permission usages by a specific permission, the
permission filter dialog only contained counts for that permission,
not the others.  This ensures we filter them out only after populating
the data structure to compute those counts.

In addition, when using the default sort, ensure we sort correctly in
the filtered case.

Test: Open filter dialog from filtered and unfiltered screens.
Test: Check sorts in filtered and unfiltered screens.
Change-Id: I7f52ebf7e8af781d19c63c9523f18556e7487586