Initial Android support

[oskarth]

Problem

mopro doesn't run on Android. We want it to run Android, and it shouldn't be too much work to get basic support.

See https://github.com/oskarth/mopro/issues/16 for other platforms

Notes

Might need to start with a subset of Android platforms, as some older versions might need additional work.

Some equivalent of Cocoapods would be useful.

Acceptance criteria

• [x] Kotlin tests mirroring Swift tests in https://github.com/oskarth/mopro/tree/main/mopro-ffi/tests/bindings
• [ ] Library equivalent to Cocoapods that bundles
• [x] With example app similar to iOS
• [x] Updated build scripts for Android
• [x] Updated basic docs