Add 384000 and maximum supported sample rates for Qt 6 AudioDeviceInfo. For #2456.

sdrbase/audio/audiodeviceinfo.cpp

@@ -44,7 +44,7 @@ QList<int> AudioDeviceInfo::supportedSampleRates() const
     // QAudioDevice is a bit more flexible than QAudioDeviceInfo, in that it supports
     // min and max rate, rather than a specific list
     // For now, we just list some common rates.
-    QList<int> sampleRates = {8000, 11025, 22050, 44100, 48000, 96000, 192000};
+    QList<int> sampleRates = {8000, 11025, 22050, 44100, 48000, 96000, 192000, 384000};
     QList<int> supportedRates;
     for (auto sampleRate : sampleRates)
     {
@@ -52,6 +52,9 @@ QList<int> AudioDeviceInfo::supportedSampleRates() const
             supportedRates.append(sampleRate);
         }
     }
+    if (!supportedRates.contains(m_deviceInfo.maximumSampleRate())) {
+        supportedRates.append(m_deviceInfo.maximumSampleRate());
+    }
     return supportedRates;
 }
 #else