Discord RPC Support

[ruskcoder]

Checklist

• I've checked that there is no other issue about this feature request.
• This issue contains only one feature request.
• The title of this issue accurately describes the feature request.

Feature description

Discord RPC shows up just like when using Spotify.

Why do you want this feature?

It would be cool to have while listening to music.

Additional information

Right now, I use an app called Kizzy, but it is laggy, so I would love if it was built in.
I am ready to take up the task, but I kinda new to Kotlin and android app dev.