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-r21-steps-c.txt

@@ -0,0 +1,3 @@
+    /* the room's roster wears the petname too, the real name beneath it */
+    { do: `__click('.room-head .btn', null)`, name: "room-users", wait: 700 },
+    { do: `document.querySelector('.scrim').click()`, wait: 500 },