feat(tile-view) allow to toggle tile view while alone

react/features/video-layout/components/TileViewButton.js

 import { TILE_VIEW_ENABLED, getFeatureFlag } from '../../base/flags';
 import { translate } from '../../base/i18n';
 import { IconTileView } from '../../base/icons';
-import { getParticipantCount } from '../../base/participants';
 import { connect } from '../../base/redux';
 import { AbstractButton, type AbstractButtonProps } from '../../base/toolbox/components';
 import { setTileView } from '../actions';
  */
 function _mapStateToProps(state, ownProps) {
     const enabled = getFeatureFlag(state, TILE_VIEW_ENABLED, true);
-    const lonelyMeeting = getParticipantCount(state) < 2;
-    const { visible = enabled && !lonelyMeeting } = ownProps;
+    const { visible = enabled } = ownProps;
 
     return {
         _tileViewEnabled: shouldDisplayTileView(state),

react/features/video-layout/functions.js

 export function shouldDisplayTileView(state: Object = {}) {
     const participantCount = getParticipantCount(state);
 
-    // In case of a lonely meeting, we don't allow tile view.
-    // But it's a special case too, as we don't even render the button,
-    // see TileViewButton component.
-    if (participantCount < 2) {
-        return false;
-    }
-
     const tileViewEnabledFeatureFlag = getFeatureFlag(state, TILE_VIEW_ENABLED, true);
     const { disableTileView } = state['features/base/config'];