chore(ios) remove warnings on JitsiMeetView

ios/sdk/src/ExternalAPI.h

 
 - (void)sendHangUp;
 - (void)sendSetAudioMuted:(BOOL)muted;
-- (void)sendEndpointTextMessage:(NSString*)to :(NSString*)message;
+- (void)sendEndpointTextMessage:(NSString*)message :(NSString*)to;
 - (void)toggleScreenShare;
 - (void)retrieveParticipantsInfo:(void (^)(NSArray*))completion;
 - (void)openChat:(NSString*)to;
 - (void)closeChat;
-- (void)sendChatMessage:(NSString*)to :(NSString*)message;
+- (void)sendChatMessage:(NSString*)message :(NSString*)to ;
 
 @end

ios/sdk/src/ExternalAPI.m

     [self sendEventWithName:setAudioMutedAction body:data];
 }
 
-- (void)sendEndpointTextMessage:(NSString*)to :(NSString*)message {
+- (void)sendEndpointTextMessage:(NSString*)message :(NSString*)to {
     NSMutableDictionary *data = [[NSMutableDictionary alloc] init];
     data[@"to"] = to;
     data[@"message"] = message;
     [self sendEventWithName:closeChatAction body:nil];
 }
 
-- (void)sendChatMessage:(NSString*)to :(NSString*)message {
+- (void)sendChatMessage:(NSString*)message :(NSString*)to {
     NSMutableDictionary *data = [[NSMutableDictionary alloc] init];
     data[@"to"] = to;
     data[@"message"] = message;

ios/sdk/src/JitsiMeetView.h

 - (void)leave;
 - (void)hangUp;
 - (void)setAudioMuted:(BOOL)muted;
-- (void)sendEndpointTextMessage:(NSString*)to :(NSString*)message;
+- (void)sendEndpointTextMessage:(NSString * _Nonnull)message :(NSString * _Nullable)to;
 - (void)toggleScreenShare;
-- (void)retrieveParticipantsInfo:(void (^)(NSArray*))completionHandler;
-- (void)openChat:(NSString*)to;
+- (void)retrieveParticipantsInfo:(void (^ _Nonnull)(NSArray * _Nullable))completionHandler;
+- (void)openChat:(NSString * _Nullable)to;
 - (void)closeChat;
-- (void)sendChatMessage:(NSString*)to :(NSString*)message;
+- (void)sendChatMessage:(NSString * _Nonnull)message :(NSString * _Nullable)to;
 
 @end

ios/sdk/src/JitsiMeetView.m

     [externalAPI sendSetAudioMuted:muted];
 }
 
-- (void)sendEndpointTextMessage:(NSString*)to :(NSString*)message {
+- (void)sendEndpointTextMessage:(NSString * _Nonnull)message :(NSString * _Nullable)to {
     ExternalAPI *externalAPI = [[JitsiMeet sharedInstance] getExternalAPI];
-    [externalAPI sendEndpointTextMessage:to :message];
+    [externalAPI sendEndpointTextMessage:message :to];
 }
 
 - (void)toggleScreenShare {
     [externalAPI toggleScreenShare];
 }
 
-- (void)retrieveParticipantsInfo:(void (^)(NSArray*))completionHandler {
+- (void)retrieveParticipantsInfo:(void (^ _Nonnull)(NSArray * _Nullable))completionHandler {
     ExternalAPI *externalAPI = [[JitsiMeet sharedInstance] getExternalAPI];
     [externalAPI retrieveParticipantsInfo:completionHandler];
 }
     [externalAPI closeChat];
 }
 
-- (void)sendChatMessage:(NSString*)to :(NSString*)message  {
+- (void)sendChatMessage:(NSString * _Nonnull)message :(NSString * _Nullable)to {
     ExternalAPI *externalAPI = [[JitsiMeet sharedInstance] getExternalAPI];
-    [externalAPI sendChatMessage:to :message];
+    [externalAPI sendChatMessage:message :to];
 }
 
 #pragma mark Private methods