rn: throw exception if default conference options set the room

See: https://github.com/jitsi/jitsi-meet/issues/4720

android/sdk/src/main/java/org/jitsi/meet/sdk/JitsiMeet.java

     }
 
     public static void setDefaultConferenceOptions(JitsiMeetConferenceOptions options) {
+        if (options != null && options.getRoom() != null) {
+            throw new RuntimeException("'room' must be null in the default conference options");
+        }
         defaultConferenceOptions = options;
     }
 

ios/sdk/src/JitsiMeet.h

  * List of domains used for universal linking.
  */
 @property (copy, nonatomic, nullable) NSArray<NSString *> *universalLinkDomains;
-
 /**
  * Default conference options used for all conferences. These options will be merged
  * with those passed to JitsiMeetView.join when joining a conference.

ios/sdk/src/JitsiMeet.m

     return _universalLinkDomains ? _universalLinkDomains : @[];
 }
 
+- (void)setDefaultConferenceOptions:(JitsiMeetConferenceOptions *)defaultConferenceOptions {
+    if (defaultConferenceOptions != nil && _defaultConferenceOptions.room != nil) {
+        @throw [NSException exceptionWithName:@"RuntimeError"
+                                       reason:@"'room' must be null in the default conference options"
+                                     userInfo:nil];
+    }
+    _defaultConferenceOptions = defaultConferenceOptions;
+}
+
 #pragma mark - Private API methods
 
 - (NSDictionary *)getDefaultProps {