Conncheck: failing ICE by checking remote consent even if consent_freshness disabled
Now priv_conn_remote_consent_tick_agent_locked
may be called even if consent_freshness property is disabled for agent.
In this case consent_timeout is taken as NICE_AGENT_TIMER_KEEPALIVE_TIMEOUT
(50s).
But in priv_map_reply_to_keepalive_conncheck
last_received is assigned only if consent_freshness
is on.
It results in sudden disconnects (failed ICE) after 50s.
We need either drop if (agent->consent_freshness)
condition in priv_map_reply_to_keepalive_conncheck
or do not check timeout if consent_freshness is off.