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-r32-player-tail.txt

@@ -0,0 +1,8 @@
+    });
+    /* the stream listener is still allowed to have nothing behind it (a
+       desktop build, the mock without the bus); the transport's failure is
+       still the one the shell shows, and the unlisten handed back is still
+       the transport's — the one onMount stores and calls on teardown. */
+    const [, unlisten] = await Promise.all([streamSub.catch(() => { /* not a phone */ }), transportSub]);
+    return unlisten;
+}