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-r47-doc-checking.txt

@@ -0,0 +1,20 @@
+And in **both**, the ground. This one is not a name or a byte but a
+resolution: `<background>` is a reference, so the check asks `aapt2 dump
+resources` what `mipmap/ic_launcher` is at `anydpi`, reads that file's
+`<background>` id, maps the id back through the table, and requires
+`drawable/ic_launcher_ground`; then it follows the two `fillColor` references
+the `aapt:attr` blocks became and requires concept 04's six stops in them.
+That is the check that catches a **stale APK** as well as a lost overlay —
+`build.sh` pipes Gradle through `| tail -20 || true` and then runs
+`ls -la "$APK"`, so a Gradle run that failed leaves the previous build's file
+exactly where the next step looks for it, with every PNG in it still the
+falcon's. Without aapt2 on the machine this half says `NOT CHECKED` and the
+rest of the script still runs.
+
+Both `build.sh` and `dev.sh` call it, so no APK this repo makes can quietly go
+back to the old artwork. It cost about a second and a half on the 107 MB debug
+APK before the ground was added; the ground is one `dump resources` and three
+`dump xmltree` calls on top of that, measured at 0.3 s against that same real
+APK — aapt2 reads `resources.arsc` and the entries it names, never the whole
+file, so the cost does not grow with the APK. The release branch reuses the
+same table rather than asking aapt2 for it twice.