feat(native-participants-pane) slider ui fixes

react/features/video-menu/components/native/VolumeSlider.js

 // @flow
 
-import Slider from '@react-native-community/slider';
 import _ from 'lodash';
 import React, { PureComponent } from 'react';
-import { View } from 'react-native';
+import { View, Slider } from 'react-native';
 import { withTheme } from 'react-native-paper';
 
 import { translate } from '../../../base/i18n';
 import { setVolume } from '../../../participants-pane/actions.native';
 import { VOLUME_SLIDER_SCALE } from '../../constants';
 
+import styles from './styles';
+
+
 /**
  * The type of the React {@code Component} props of {@link VolumeSlider}.
  */
         const onVolumeChange = _startSilent ? undefined : this._onVolumeChange;
 
         return (
-            <View>
+            <View style = { styles.volumeSliderContainer } >
                 <Icon
-                    size = { 24 }
-                    src = { IconVolumeEmpty } />
+                    size = { 20 }
+                    src = { IconVolumeEmpty }
+                    style = { styles.volumeIcon } />
                 <Slider
                     maximumTrackTintColor = { palette.field02 }
                     maximumValue = { VOLUME_SLIDER_SCALE }
                     minimumTrackTintColor = { palette.action01 }
                     minimumValue = { 0 }
                     onValueChange = { onVolumeChange }
+                    style = { styles.sliderContainer }
                     thumbTintColor = { palette.field02 }
                     value = { volumeLevel } />
             </View>

react/features/video-menu/components/native/styles.js

     },
 
     sliderContainer: {
-        marginLeft: BaseTheme.spacing[3],
-        minWidth: '88%'
+        marginLeft: BaseTheme.spacing[2],
+        minWidth: '92%'
     }
 });