android: Add multiplayer support ported from MMJ

[kleidis]

This is a refactoring and porting of MMJ's multiplayer frontend and JNI backend to the current codebases

• [x] Add missing PC features that never were added to mmj's implementation

• [ ] Add a chat dialog (Needs testing)

• [x] Improve UI

• [ ] Clean up JNI and Kotlin (Im progress)

• [ ] Test the entire multiplayer port meaningfully

• [ ] Try and fix some known bugs

• Kick button not working

  • • This happens due to the host not getting mod permissions on room create

• Workaround for MainActicity

• • Multiplayer shouldn't be closed on activity restart. This was implemented to avoid issues with the thekes section and is a shitty workaround, which may cause issues

• Chat bot being initalized on EmuActivity

[kleidis]

As far as my own testing goes

It works as expected apart from the host not being given mod to be able to kick other players

I have not been able to fix this

[kleidis]

Closed due to the announcements of mandarine rebasing

Will get reopened later