fix(android): keep screen on on fullscreen (#3563)

add KEEP_SCREEN_ON flag when video is fullscreen & playing to avoid phone to go off.
inspired by 2d8466128d

examples/basic/src/VideoPlayer.tsx

@@ -790,6 +790,7 @@ class VideoPlayer extends Component {
           selectedTextTrack={this.state.selectedTextTrack}
           selectedAudioTrack={this.state.selectedAudioTrack}
           playInBackground={false}
+          preventsDisplaySleepDuringVideoPlayback={true}
         />
       </TouchableOpacity>
     );