[Maintenance] Update NDK dependencies

[kanerogers]

[Maintenance] Update NDK dependencies

[kanerogers]

Switching to android-activity seems like a good idea, it'll just take a bit of work. Here's the API for android_activity

use android_activity::AndroidApp;

#[no_mangle]
fn android_main(app: AndroidApp) {
  loop { app.poll_events(..) }
}

This design is a lot cleaner and more - dare I say - it Rusty than ndk-glue as it doesn't require any magic global variables.

However, this would require some updates to Engine as we'd need to pass AndroidApp into it and update its polling logic. Not impossible, but a bit tricky as we'd have to find a way to keep things cross-platform