AnkiDroid: update Third Party Apps description

[david-allison]

I mentioned that I'd love to see AnkiConnect for Android, and I was sent a link to this project. THANK YOU!!!!

I've added a link to the project on AnkiDroid's Third Party Apps page.

Feel free to update the description as you see fit (or close this issue without comment).

Thank you again!
-- David

[KamWithK]

Thanks mate