Pass an apply token to BBQ

Allow BBQ to use a passed in apply token for applying transactions. This
allows us to order transactions when a BBQ is recreated by sharing
the same apply token between the BBQs.

Flag: EXEMPT bugfix
Test: presubmit
Fixes: 353332587
Change-Id: Icbadce96e9f72f13a26c4430cdfadf6ea315ce84