//! On-device smoke test for the audio-active gate.
//!
//! One binder transaction to the `audio` service, decoded by the library
//! (`audio_has_active_playback`): prints whether any player is in
//! `PLAYER_STATE_STARTED`.
//!
//! cargo build --target aarch64-linux-android --example audio_probe
//! adb push target/aarch64-linux-android/debug/examples/audio_probe /data/local/tmp/
//! adb shell /data/local/tmp/audio_probe
// The `audio_has_active_playback` API is android-only (binder probe); the
// host build keeps a stub `main` so `cargo test` compiles the example.