FFM-11164 Evaluate AND rules

[erdirowlands]

What

Supports new AND rules:

• GroupServingRule is the new rule type sent by the backend. They are:
  • Evaluated by Priority
  • GroupServingRule.Clauses are AND'ed
  • Additional GroupServingRule with lesser priority are OR'd (with their clauses AND'ed).
• If there are no GroupServingRule to evaluate, then we fall back to the legacy Rule which is OR`d.

Testing

• Unit tests