MT#55283 set mux-offer when require is set

Change-Id: I18cbb52670c025db3384c4b4d39a136e9c7f3690
(cherry picked from commit 2be254b0f8)

daemon/call.c

@@ -2029,7 +2029,7 @@ static void __disable_streams(struct call_media *media, unsigned int num_ports)
 }
 
 static void __rtcp_mux_set(const sdp_ng_flags *flags, struct call_media *media) {
-	if (flags->rtcp_mux_offer || flags->rtcp_mux_require)
+	if (flags->rtcp_mux_offer)
 		MEDIA_SET(media, RTCP_MUX);
 	else if (flags->rtcp_mux_demux)
 		MEDIA_CLEAR(media, RTCP_MUX);

daemon/call_interfaces.c

@@ -831,6 +831,7 @@ static void call_ng_flags_rtcp_mux(str *s, unsigned int idx, helper_arg arg) {
 			out->rtcp_mux_reject = true;
 			break;
 		case CSH_LOOKUP("require"):
+			out->rtcp_mux_offer = true;
 			out->rtcp_mux_require = true;
 			break;
 		default: