TT#14800 update last_packet during signalling events

closes #1283

Change-Id: I640ff269643eb6ecf9d6fd2a21601aeb39acac58
(cherry picked from commit 017dbbd330)

daemon/call.c

@@ -992,6 +992,8 @@ static void __fill_stream(struct packet_stream *ps, const struct endpoint *epp,
 	struct endpoint ep;
 	struct call_media *media = ps->media;
 
+	atomic64_set_na(&ps->last_packet, rtpe_now.tv_sec);
+
 	ep = *epp;
 	ep.port += port_off;