Constant redraw because of position and buffer updates

[TimoshN]

Hello, trying to adapt your good app for linux based mobile phone and faced with issue with constant redraw.

iris/lib/hooks/use_media_kit_player.dart

Line 125 in deae72a

final positionStream = useStream(player.stream.position);

iris/lib/hooks/use_media_kit_player.dart

Line 102 in deae72a

Duration buffer = useStream(player.stream.buffer).data ?? Duration.zero;

Those places making IrisPlayer widget redraw and reduce video output FPS as well even if ui is not show

[nini22P]

Fixed. The player component no longer continuously redraws.