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-r43-consumer-media.txt

@@ -0,0 +1,22 @@
+# Consumer R8/ProGuard rules for the media-session plugin. Inert unless the
+# consuming app minifies, and only the `release` build type does, so the
+# debug APK the deploy pipeline builds is untouched by this file.
+#
+# MediaSessionPlugin is found by the string
+# "com/soulstream/mediasession/MediaSessionPlugin" (register_android_plugin →
+# FindClass), constructed through "(Landroid/app/Activity;)V", and its two
+# @Command methods — update and clear — are dispatched by NAME through
+# PluginHandle's commands map. NowPlayingArgs is filled by Jackson field by
+# field. Rename any of it and the app still builds, installs and plays; the
+# lock-screen card simply never appears.
+#
+# The other half of this plugin is in the app-wide file: the card's buttons
+# come back as the plugin event "action", which the WebView subscribes to
+# through Plugin.registerListener — declared on tauri's base class, which no
+# rule of tauri's own names. See src-tauri/android/proguard-soulstream.pro.
+#
+# MediaService and androidx's MediaButtonReceiver are declared in this
+# module's AndroidManifest.xml, so AGP's own merged-manifest keep rules hold
+# them by name. Not repeated here: one place decides each of them.
+-keep class com.soulstream.mediasession.MediaSessionPlugin { *; }
+-keep class com.soulstream.mediasession.NowPlayingArgs { *; }