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-stream.txt

@@ -0,0 +1,11 @@
+    /* Two subscriptions in one round, for the same reason as everywhere
+       else this round: `listen` is an invoke, so one behind the other is
+       two bridge round trips at launch. Both are in flight from here; they
+       are awaited together at the end, so neither can reject with nobody
+       listening. */
+    const streamSub = listen("soulseek:stream", (ev) => {
+        const p = ev.payload || {};
+        if (!current()?.t?.stream) return;
+        player.stream = { received: p.received || 0, total: p.total || 0, done: !!p.done, failed: p.failed || null };
+        if (p.failed) setErr("The stream from " + current().t.stream.username + " failed: " + p.failed);
+    });