Android: Rewrite Wii system updates in Kotlin

[t895]

This initially was an attempt at preserving the updater process during configuration changes through coroutines, but afaik that is not possible without changing how the backend works. There is currrently some kind of bug somewhere between the android ndk and our backend that causes a file rename to fail on any kind of configuration change. This includes dark theme toggling, screen size change, or orientation change. I don't currently have the knowledge to fix this bug and I'd prefer to leave it for later. I attempted to cancel and restart the updater during a configuration change, but the error is thrown before I can handle it (at least without handling the entire configuration change myself but that would become clunky).

For now, I have rewritten the android app side of the updater in Kotlin and using a coroutine. This ensures the scope is cancelled properly once the viewmodel is destroyed. I've chosen to remove the orientation lock and let the dialog handle the failure. I believe it's best that we avoid locking device features especially since this can be easily started again without lost progress.

This also includes changing the progress bar to an indeterminate one during the cancellation process.

[lioncash]

Since this was opened in Jan, could this get a rebase just to make sure there's no conflicts with anything?

[t895]

Seems like everything is working fine