Hide button to turn on paused profile.

Since DocsUi does not have the permission to receive profile
available/unavailable broadcasts when launched from a non-foreground
user profile, the button to turn on a paused profile (work profile) will
not be shown.

Bug: 363183071
Test: Manual, see screenshot
Screenshot: http://screen/6vYrpxdjremdib6
Flag: EXEMPT bugfix
Change-Id: I29364c8bdc5f1baed5d9ab54dc4e2e589c711936