Add log to troubleshoot service startup

Update playback thread init

neon_audio/__main__.py

@@ -60,6 +60,7 @@ def main(*args, **kwargs):
     setup_locale()
     try:
         service = NeonPlaybackService(*args, **kwargs)
+        LOG.info("Service init completed")
         service.start()
         wait_for_exit_signal()
     except Exception as e:

neon_audio/service.py

@@ -90,7 +90,6 @@ def __init__(self, ready_hook=on_ready, error_hook=on_error,
         PlaybackService.__init__(self, ready_hook, error_hook, stopping_hook,
                                  alive_hook, started_hook, watchdog, bus,
                                  disable_ocp, validate_source=False)
-        self.playback_thread.join()
         del self.playback_thread
         from neon_audio.tts.neon import NeonPlaybackThread
         from ovos_plugin_manager.tts import TTS