android: the handoff — the pending rounds, the pipeline, and what is unverified

Everything written this session that has not been through the device: rounds 43
to 48 (each patch adversarially verified, 43's transient-notice expectation
fixed), a partial round 49, the pipeline scripts, the Android Auto design and
the icon comparison mock. Also the two harness changes that were never A/B'd —
adaptive waits, which may only shorten a declared wait and never lengthen it,
and a ship that runs the mock walk and the deploy at the same time. The A/B and
its 255-step baseline are in handoff/tools; main stays at what the phone has
actually walked.

handoff/rounds/ins-r49-doc-cardproves.txt

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+queue window arriving across the bridge, field for field (`queue-window`);
+and both of the intent filters Android Auto knocks on — the legacy
+`android.media.browse.MediaBrowserService` and media3's own
+`androidx.media3.session.MediaLibraryService` — resolving to `MediaService`
+(`auto-browse`, `auto-library`), which is also the guard for a media-session
+plugin that compiled and never reached the APK: the service, its filters and
+the Auto meta-data live in one library manifest and are lost together, which
+this project has already been through once as a start-up
+`ClassNotFoundException`. Printed but never failed, because their `dumpsys`
+formats have never been read back from this phone: whether the service is
+foreground, whether our audio focus is in the system's stack, and whether the
+becoming-noisy receiver is registered (`media-plumbing`). Printed and never
+failed for a different reason — `pm dump` prints no application meta-data at
+all, so nothing on the phone can be asked about it — the
+`com.google.android.gms.car.application` declaration as `tools/auto-prober/`
+last resolved it (`auto-desc`).
+
+**The browse tree is not proven here and cannot be.** With the app
+force-stopped there is no WebView, so no DevTools socket, so `smoke.mjs` has
+nothing to attach to; `tools/auto-prober/` is the instrument for that, and
+"### The Auto prober" under Verifying is where it lives.