Fix various issues with multiple profiles.

Pass parameters to intents to control how we launch them.  This fixes
two bugs with work profiles and one bug where we re-opened an existing
screen instead of opening a new one.

Fixes: 128625591
Fixes: 129343829
Fixes: 130421569
Test: Reproduce all three bugs and they're all fixed.
Test: Click normal and work apps in dashboard, see right screens.
Change-Id: I29fd4ee4fb46ee2cd69186c29824e951f9d05318