For what it's worth, here's the relevant section from the patch description:

    Correctness and feature parity
    ------------------------------

    Rust binder passes all tests that validate the correctness of Binder in
    the Android Open Source Project. We can boot a device, and run a variety
    of apps and functionality without issues. We have performed this both on
    the Cuttlefish Android emulator device, and on a Pixel 6 Pro.