rn,flags: add more feature flags to toggle specific behavior

- Invite funcionality (altogether)
- Recording
- Live streaming
- Meeting name
- Meeting password

react/features/chat/components/native/ChatButton.js

@@ -1,5 +1,6 @@
 // @flow
 
+import { CHAT_ENABLED, getFeatureFlag } from '../../../base/flags';
 import { IconChat, IconChatUnread } from '../../../base/icons';
 import { setActiveModalId } from '../../../base/modal';
 import { getLocalParticipant } from '../../../base/participants';
@@ -114,16 +115,18 @@ function _mapDispatchToProps(dispatch: Function) {
  * Maps part of the redux state to the component's props.
  *
  * @param {Object} state - The Redux state.
- * @returns {{
- *     _unreadMessageCount
- * }}
+ * @param {Object} ownProps - The properties explicitly passed to the component instance.
+ * @returns {Props}
  */
-function _mapStateToProps(state) {
+function _mapStateToProps(state, ownProps) {
     const localParticipant = getLocalParticipant(state);
+    const enabled = getFeatureFlag(state, CHAT_ENABLED, true);
+    const { visible = enabled } = ownProps;
 
     return {
         _showNamePrompt: !localParticipant.name,
-        _unreadMessageCount: getUnreadCount(state)
+        _unreadMessageCount: getUnreadCount(state),
+        visible
     };
 }