WearOS Support

[Mstrodl]

Just wanted to say how great this library is! Thanks for making it!

I'm trying to make a WearOS app, and the biggest point of friction for me right now is how to make auth work. Google suggests device authorization grants. Additionally, WearOS doesn't have it's own browser, so we'll need a way of launching intents on a paired device. I'm going to try and tackle this, but any advice would be much appreciated! :)