Support passing cookies

[shayypy]

Some media requires cookie authorization to access, fortunately VLCKit supports this via a function on VLCMedia. This draft is currently iOS/tvOS-only because I haven't done the work for Android yet (would love it if someone more familiar with the Android code could help out there!)

[razorRun]

@shayypy heya
just merged in two PRs looks like there is a small conflict, when you ready can i get you to resolve it please and do a quick test on both platforms
cheers

[shayypy]

Resolved, will test again later. But as mentioned this is a draft because there are no changes to make this feature compatible with Android devices yet

[shayypy]

So after researching a bit, I'm actually not sure whether this is possible. I found this but I believe this is just the low-level API and I'm not sure if there's a Java binding for the method in LibVLC. I also found this comment from Rémi, but of course I already knew it was possible at some level, since I'm doing it in obj-c.

I'm really not familiar with Java so correct me if I'm wrong please. If this PR has to be iOS-only that would be unfortunate but still worth committing I think.