Handles peer ready & peer destroyed streams events

lib/lists/call_members_list.dart

@@ -11,4 +11,7 @@ class CallMembersList extends AbstractList<CallMember> {
 
   /// Remove a specific member from this list
   void removeUser(int userID) => this.removeWhere((f) => f.id == userID);
+
+  /// Get the connection of a specific user
+  CallMember getUser(int userID) => this.firstWhere((f) => f.id == userID);
 }