Init context devices deferred as the settings are ONLY available after DBus is initialized

* we init in a context constructor
* a this time it is not clear:
** if we will use a DBus scenario
** or standalone scenario

src/blackcore/context/contextaudio.h

@@ -339,6 +339,9 @@ namespace BlackCore
             int m_outVolumeBeforeMute = 90;
             static constexpr int MinUnmuteVolume = 20; //!< minimum volume when unmuted
 
+            //! Do we use a local core
+            static bool isRunningWithLocalCore();
+
             // settings
             BlackMisc::CSetting<BlackMisc::Audio::TSettings>   m_audioSettings { this, &CContextAudioBase::onChangedAudioSettings };
             BlackMisc::CSetting<BlackMisc::Audio::TVoiceSetup> m_voiceSettings { this, &CContextAudioBase::onChangedVoiceSettings };