Add user preference for intro skipping method

[jumoog]

Would be nice if each user could choose if they want auto skip or just button.

~~Also, would be good if we could specify certain clients where it would automatically skip, for people with Android TV's who don't want to recompile the whole app, if you just set it to skip intro, you won't need the button.~~

from https://github.com/ConfusedPolarBear/intro-skipper/issues/18

[AbandonedCart]

All you need is the client default. Everything else is done already.

[jumoog]

yeah its not hard todo

[AbandonedCart]

Wasn't the Android TV part the missing one? We already have options to select the method manually.

[jumoog]

Yes, but my sister, for example, loves to watch intros on her Android TV 😂