Function ring_offer_early_with_policy_at 

pub async fn ring_offer_early_with_policy_at(
    endpoint: &Handle,
    incoming: &Incoming,
    status: u16,
    reason: &'static str,
    media_address: MediaAddress,
    direction: Direction,
    policy: MediaPolicy,
) -> Result<Ringing>

ring_offer_early_with_policy with independent advertised and bound media addresses.