feat: upgrade Android Auth library to 2.0.2

[wwdrew]

Fixes #209 .

Changes introduced in this pull request:

• Update SpotifySDK submodule to latest commit
• Update build.gradle to import auth-lib from maven
• Remove clearCookies method call as this no longer exists in new SDK

Tasks

• Add yourself as contributor via yarn contribute
• Update Unreleased section of CHANGELOG.md with changes (Convention)

@cjam

Please note I'm having problems testing this change so there's a high chance it doesn't work. However, everything in Android Studio is saying it's okay so I'm hopeful it should work. I just couldn't get a package to build I could import into my project to make sure.

[cjam]

Awesome thanks for the PR! sorry for the delay, I've been underwater at work.
I will try and merge and test it as soon as I can.

[wwdrew]

Hi @cjam, no worries I know exactly how it feels :)

I've managed to move this PR forward a little testing-wise and there's still some more work to be done on it, Spotify's changed a few things in the move from v1 -> v2 of the auth sdk that I'm trying to integrate properly.

I've also taken this comment (#203) into consideration and changed how the auth-sdk is imported, as it's the only way to get v2.0.2.

I should probably mark this PR as WIP until I've got it sorted really.