Fix issue with provided options not being applied when launching split tasks

- Since SysUI/Shell is making the call to start the app pair tasks in a
  WCT, we also need to expand the restriction on who can freeze the
  list (to any caller with MANAGE_ACTIVITY_TASKS)

Bug: 206000278
Test: Quickswitch from app pair and back
Change-Id: I7f455fde87edfbcb7d856d842710c2a4542d7207