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This was solved a little while ago.

For a very limited subset of Android devices

The only limit I see there is Android OS 6+. That's not exactly a significant limit.

Here are the relevant passages: https://i.imgur.com/cIMIyao.png

Is that implementation open-source? I'm sure it's bundled as part of Google Play, not AOSP.

Looks like you're right. They built it in rust and embedded it in Google Play services. Booo.