Add privacy manifest files

[fujimo-t]

I have been looking for a successor of flutter_app_badger since it seems to be dead. I also found other plugin but I think this is better than others by following reasons:

• Modern and clean code (Implemented by swift and federated plugin's way)
• Not contains old and vendor specific Android implementation (I think it is useless for most developers and provided as non-endorsed federated plugin)

So I'm trying this plugin but I noticed that Privacy Manifest files not found.

Could you add the manifest files? (or creating merge request from me is better?)

[isaacadariku]

@fujimo-t thanks for bringing this up.

[fujimo-t]

Thank you for the quick response and also deps update! I'll try it.