Always show the horizontal progress bar when updating Permissions Hub.

This ensures we always show the new horizontal progress bar when
updating the Permissions Hub UI.  Previously we only did it when
loading new data; this extends us to also show it when showing/hiding
system apps or changing a group filter.  On my dev device these happen
very quickly, so it doesn't matter much, but if they are slower on
other devices it's probably worth doing.

Test: Reload Permissions Hub.
Change-Id: Ib3d9d5e0b9196e17ee4f51fd4ff8459256d4e7a2