fix: Donot show download option in super and broadcast channels (#593)

### Description Of Changes

* Do not display the download option for super and broadcast channels

[UIKIT-3904](https://sendbird.atlassian.net/browse/UIKIT-3904)

Author: HoonBaek

src/ui/MobileMenu/MobileContextMenu.tsx

@@ -16,6 +16,7 @@ import {
 import { useLocalization } from '../../lib/LocalizationContext';
 import Icon, { IconTypes, IconColors } from '../Icon';
 import Label, { LabelColors, LabelTypography } from '../Label';
+import { GroupChannel } from '@sendbird/chat/groupChannel';
 
 const MobileContextMenu: React.FunctionComponent<BaseMenuProps> = (props: BaseMenuProps): React.ReactElement => {
   const {
@@ -38,7 +39,10 @@ const MobileContextMenu: React.FunctionComponent<BaseMenuProps> = (props: BaseMe
   const showMenuItemEdit: boolean = (isUserMessage(message as UserMessage) && isSentMessage(message) && isByMe);
   const showMenuItemResend: boolean = (isFailedMessage(message) && message?.isResendable && isByMe);
   const showMenuItemDelete: boolean = !isPendingMessage(message) && isByMe;
-  const showMenuItemDownload: boolean = !isPendingMessage(message) && isFileMessage(message);
+  const showMenuItemDownload: boolean = !isPendingMessage(message)
+    && isFileMessage(message)
+    && !(channel as GroupChannel)?.isSuper
+    && !(channel as GroupChannel)?.isBroadcast;
   const showMenuItemReply: boolean = (replyType === 'QUOTE_REPLY')
     && !isFailedMessage(message)
     && !isPendingMessage(message)