Refresh both lists and pinning preferences on change.

This fixes several issues relating to pinning and work profile.
(In future, we might want to maintain a separate pinned list for
WP than for main profile - this CL doesn't address that but
doesn't prevent it.)

Fixes: 159038941, 159035711
Test: atest ChooserActivityTest, manual with WP enabled thru TestDPC
Change-Id: Ibbe908a60dfeee859e576c5e1473123f02147958