Pass target stack id when launching from recents.

This fixes recents to freeform activities animation problem when the
activities where previously in a non-freeform stack. Their stack id
still reports fullscreen, even though they will enter freeform. Because
of this we need to pass the target stack id with the call that creates
animation spec.

Bug: 24814340
Change-Id: Iea589d458c29c3644f351b29f51e8f8cfb5f90e3