Be more consistent with Q when the tabs feature flag is disabled.

This change involves 2 things:
- Check when there are apps on the other profile when deciding
whether to autolaunch with the tabs disabled
- Only take into account the rebuildInactiveTab result when
the tabbed view is enabled. Otherwise it's always false and
that always calls postRebuildList with false.

Fixes: 149031386
Test: manual
Change-Id: I166b3abca3c0da38b3c496b34f139107f6b56410