Reword the permanent client-window refusal text and drop the stale P12 tag.

android-plugin/app/src/trace/cpp/trace_replay_jni.cpp

@@ -176,10 +176,10 @@ Java_top_mobilegl_plugin_trace_TraceReplayActivity_nativeRunTraceReplay(JNIEnv*
     // (apitrace_glws_android.cpp's createSurface), so handing Magma a window was the same as
     // asking for one.
     //
-    // P6 needs the pbuffer path on BOTH backends. Until P12 a spawned server cannot be given a
-    // window at all - an ANativeWindow* is a pointer into the CLIENT's process, and
+    // P6 needs the pbuffer path on BOTH backends. A spawned server cannot be given the client's
+    // window - an ANativeWindow* is a pointer into the CLIENT's process, and
     // SetWindowHandle is refused on the way across with Fatal{UnmigratedSurface,
-    // "AndroidNativeWindow@P12"} (Rule H). Measured: the DirectVulkan spawn arm died on exactly
+    // "AndroidNativeWindow:use-MOBILEGL_IPC_SURFACE=server"} (Rule H, permanent; a windowed client uses MOBILEGL_IPC_SURFACE=server). Measured: the DirectVulkan spawn arm died on exactly
     // that, one op after the server had come up green, while DirectGLES with the same flag passed.
     //
     // Every existing caller is unaffected: nobody asks for a Vulkan pbuffer today, and

android-plugin/trace-replay-ci.sh

@@ -451,9 +451,10 @@ run_retrace() {
   fi
   # PBUFFER IS A SURFACE SHAPE, NOT A BACKEND PROPERTY, and the DirectGLES condition that used to
   # guard this line made it one. It was harmless while the only caller was the ANGLE lane; P6 needs
-  # it on BOTH backends, because until P12 the spawn arm can only use pbuffer/surfaceless - an
+  # it on BOTH backends, because the spawn arm can only use pbuffer/surfaceless (a windowed client
+  # uses MOBILEGL_IPC_SURFACE=server) - an
   # ANativeWindow* is a pointer into the CLIENT's process and SetWindowHandle is refused by name
-  # with Fatal{UnmigratedSurface, "AndroidNativeWindow@P12"} on the way across. Magma creates an
+  # with Fatal{UnmigratedSurface, "AndroidNativeWindow:use-MOBILEGL_IPC_SURFACE=server"} on the way across. Magma creates an
   # EGL pbuffer exactly as Espryt does.
   if [ "${use_pbuffer}" -eq 1 ]; then
     set -- "$@" --ez use_pbuffer true