[Android] Predictive back support

[Rexogamer]

since Android 13, Google have been working on adding support for predictive back gestures on Android. these let the user see where they'll end up when swiping or pressing back.

I think they were enabled by default in either Android 14 or 15? but in any case, they're being pushed with future versions, and (at least in my opinion) they provide a nicer user experience.

see also this from the release of Android 14.

one slight issue here is that, unlike traditional back handling, to be able to show the correct animations it needs to be certain whether swiping/pressing back will trigger a transition before the user goes back. Flutter solved this by maintaining a consistent state for whether going back will be handled/interrupted by the app or whether it'll trigger a transition - maybe something similar could be the solution here?

[cortinico]

This was partially discussed here:

• Are there any plans to replace unsupported APIs (KEYCODE_BACK and #onBackPressed) to support Android's new Predictive back gesture?  facebook/react-native#34529