When creating ServiceOptions objects or fake HashConfigs use the
constant to refer the config name
Change-Id: I59a29f25b76e896c07e82156c6cc4494f98e64cc
This replaces JobQueueGroup::singleton and ::destroySingletons.
A JobQueueGroup service has been added to serve as convenience
getter.
Bug: T277648
Change-Id: Ic8709119773ab788a07531193dc65d418536eda2