[MacOS] Ask user for permission to access microphone

This is required for MacOS 10.14 and later. This also requires an explanation why
access is required in the apps Info.plist. Hence added custom Info.plist templates
for each app.

src/blackcore/audiodevice.h

@@ -43,6 +43,30 @@ namespace BlackCore
         virtual void setInputDevice(const BlackMisc::Audio::CAudioDeviceInfo &device) = 0;
     };
 
+    class BLACKCORE_EXPORT CAudioInputDeviceDummy : public IAudioInputDevice
+    {
+        Q_OBJECT
+    public:
+        //! Constructor
+        CAudioInputDeviceDummy(QObject *parent = nullptr) : IAudioInputDevice(parent) {}
+
+        //! Destructor
+        virtual ~CAudioInputDeviceDummy() override = default;
+
+        //! \copydoc IAudioInputDevice::getInputDevices
+        virtual const BlackMisc::Audio::CAudioDeviceInfoList &getInputDevices() const override { return m_devices; }
+
+        //! \copydoc IAudioInputDevice::getCurrentInputDevice
+        virtual const BlackMisc::Audio::CAudioDeviceInfo &getCurrentInputDevice() const override { return m_currentDevice; }
+
+        //! \copydoc IAudioInputDevice::setInputDevice
+        virtual void setInputDevice(const BlackMisc::Audio::CAudioDeviceInfo &device) override { m_currentDevice = device; }
+
+    private:
+        BlackMisc::Audio::CAudioDeviceInfoList m_devices; /*!< in and output devices */
+        BlackMisc::Audio::CAudioDeviceInfo m_currentDevice;
+    };
+
     //! Audio Output Device
     class IAudioOutputDevice : public QObject
     {