task(rn): hide screen share button when audioOnly mode

react/features/toolbox/components/native/ScreenSharingButton.js

@@ -1,6 +1,10 @@
+// @flow
+
 import React from 'react';
 import { Platform } from 'react-native';
 
+import { connect } from '../../../base/redux';
+
 import ScreenSharingAndroidButton from './ScreenSharingAndroidButton.js';
 import ScreenSharingIosButton from './ScreenSharingIosButton.js';
 
@@ -15,4 +19,22 @@ const ScreenSharingButton = props => (
     </>
 );
 
-export default ScreenSharingButton;
+/**
+ * Maps (parts of) the redux state to the associated props for the
+ * {@code ScreenSharingButton} component.
+ *
+ * @param {Object} state - The Redux state.
+ * @private
+ * @returns {{
+ *     _disabled: boolean,
+ * }}
+ */
+function _mapStateToProps(state): Object {
+    const disabled = state['features/base/audio-only'].enabled;
+
+    return {
+        _disabled: disabled
+    };
+}
+
+export default connect(_mapStateToProps)(ScreenSharingButton);