App 2.40.4: the recorder's listening works on Android 9

listenToProperties looked only for registerCallback (Android 10); the
car's car library has registerListener/unregisterListener. Take either,
unsubscribe property by property, and say why when it fails.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LhzAVaUyqcw5PkGjz4mWW6

app/src/main/java/com/evsuite/abrp/SignalRecorder.java

@@ -103,7 +103,8 @@ final class SignalRecorder {
             rec.note(System.currentTimeMillis(), "listening failed: " + t.getClass().getSimpleName());
         }
         rec.note(System.currentTimeMillis(), listening == null
-                ? "listening to the assistance properties: not possible (no car service)"
+                ? "listening to the assistance properties: not possible ("
+                        + EVHardware.INSTANCE.getListenProblem() + ")"
                 : "listening to " + listening.getSubscribed() + " assistance properties ("
                         + listening.getRefused() + " refused)");
         try {