[Bug] Updater is broken on Android 10+

### Is there an existing issue for this?

- [X] I have searched the existing issues

### What happened?

Updater currently doesn't work properly on newer versions of Android

### Expected behaviour

Updater should work properly (i.e. check that the app has perms to request for the installation of packages, be able to download the APK to an appropriate app directory, then open the file in the package installer)

### Reproduction steps

Test the updater on newer versions of Android (10+ due to Scoped Storage changes I believe)

### Application variant

Release, Debug, Nightly

### Application version

All versions

### Application version code

_No response_

### Relevant log output

_No response_

### Possible solution

- Consider saving the downloaded APK to the app's internal storage?
- See how apps that aren't on the Play Store handle in-app updates (e.g. Tachiyomi)

### Additional context

The updater is pretty broken 🤷