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

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

  */
 type Props = AbstractButtonProps & {
 
+    /**
+     * True if the button needs to be disabled.
+     */
+    _disabled: boolean,
+
     /**
      * Whether video is currently muted or not.
      */
         this.props.dispatch(toggleScreensharing(enable));
     }
 
+    /**
+     * Returns a boolean value indicating if this button is disabled or not.
+     *
+     * @protected
+     * @returns {boolean}
+     */
+    _isDisabled() {
+        return this.props._disabled;
+    }
+
     /**
      * Indicates whether this button is in toggled state or not.
      *
  * @param {Object} state - The Redux state.
  * @private
  * @returns {{
- *     _disabled: boolean,
  *     _screensharing: boolean
  * }}
  */

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

+// @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';
 
     </>
 );
 
-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);

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

  */
 type Props = AbstractButtonProps & {
 
+    /**
+     * True if the button needs to be disabled.
+     */
+    _disabled: boolean,
+
     /**
      * Whether video is currently muted or not.
      */
       NativeModules.ScreenCapturePickerViewManager.show(handle);
   }
 
+  /**
+   * Returns a boolean value indicating if this button is disabled or not.
+   *
+   * @protected
+   * @returns {boolean}
+   */
+  _isDisabled() {
+      return this.props._disabled;
+  }
+
   /**
    * Indicates whether this button is in toggled state or not.
    *