chore(sample): refactor sample code to follow rn best practices (#3990)

Co-authored-by: Olivier Bouillet <62574056+freeboub@users.noreply.github.com>

examples/basic/src/components/TextTracksSelector.tsx

@@ -1,6 +1,6 @@
 import {Picker} from '@react-native-picker/picker';
 import {Text} from 'react-native';
-import {TextTrack, SelectedTrack} from 'react-native-video';
+import type {TextTrack, SelectedTrack} from 'react-native-video';
 import styles from '../styles';
 import React from 'react';