Autolaunch when active tab has 1 target and inactive tab has 0 targets.

Also fixes bug where we autolaunch without waiting for the inactive
tab list to load. If the inactive tab's targets are 0 since they
are not loaded, if the active tab's targets are 1, it would
incorrectly autolaunch.

Test: manually tried attaching a file in gmail with no cross-profile
intents
Fixes: 149383054
Change-Id: I1a2455088762dce7265ae4b7ad2c6bc8b217f99e