fix(presence) Parse peer presence in legacy format correctly.

When source-name signaling is enabled, get correct peermedia info when the peer sends presence in the legacy format. This fixes an issue where Jigasi users cannot be heard by endpoints that have source-name signaling enabled.

modules/RTC/TraceablePeerConnection.js

     logger.info(`${this} creating remote track[endpoint=${ownerEndpointId},ssrc=${trackSsrc},`
         + `type=${mediaType},sourceName=${sourceName}]`);
 
-    const peerMediaInfo = FeatureFlags.isSourceNameSignalingEnabled()
-        ? this.signalingLayer.getPeerSourceInfo(ownerEndpointId, sourceName)
-        : this.signalingLayer.getPeerMediaInfo(ownerEndpointId, mediaType);
+    const peerMediaInfo = this.signalingLayer.getPeerMediaInfo(ownerEndpointId, mediaType, sourceName);
 
     if (!peerMediaInfo) {
         GlobalOnErrorHandler.callErrorHandler(

modules/xmpp/SignalingLayerImpl.js

     /**
      * @inheritDoc
      */
-    getPeerMediaInfo(owner, mediaType) {
+    getPeerMediaInfo(owner, mediaType, sourceName) {
         const legacyGetPeerMediaInfo = () => {
             if (this.chatRoom) {
                 return this.chatRoom.getMediaPresenceInfo(owner, mediaType);
             }
             logger.error('Requested peer media info, before room was set');
         };
+        const lastPresence = this.chatRoom.getLastPresence(owner);
 
-        if (FeatureFlags.isSourceNameSignalingEnabled()) {
-            const lastPresence = this.chatRoom.getLastPresence(owner);
-
-            if (!lastPresence) {
-                throw new Error(`getPeerMediaInfo - no presence stored for: ${owner}`);
-            }
+        if (!lastPresence) {
+            throw new Error(`getPeerMediaInfo - no presence stored for: ${owner}`);
+        }
 
+        if (FeatureFlags.isSourceNameSignalingEnabled()) {
             if (!this._doesEndpointSendNewSourceInfo(owner)) {
                 return legacyGetPeerMediaInfo();
             }
 
+            if (sourceName) {
+                return this.getPeerSourceInfo(owner, sourceName);
+            }
+
             /**
              * @type {PeerMediaInfo}
              */