soundd: use setLoopCount(0) to stop repeating sound (#23076)

* use setLoopCount(0) to stop sound

* print default backend name
old-commit-hash: 35885745f1

selfdrive/ui/soundd/sound.cc

@@ -65,7 +65,7 @@ void Sound::setAlert(const Alert &alert) {
     for (auto &[s, loops] : sounds) {
       // Only stop repeating sounds
       if (s->loopsRemaining() > 1 || s->loopsRemaining() == QSoundEffect::Infinite) {
-        s->stop();
+        s->setLoopCount(0);
       }
     }