Upgrade video_player_platform_interface to 6.0.1

(cherry picked from commit 86bb399)

pubspec.yaml

@@ -16,7 +16,7 @@ flutter:
 
 dependencies:
   meta: ^1.7.0
-  video_player_platform_interface: ^5.1.2
+  video_player_platform_interface: ^6.0.1
 
   # The design on https://flutter.dev/go/federated-plugins was to leave
   # this constraint as "any". We cannot do it right now as it fails pub publish