[VCM] Track newly added microphones (#16199)

* [VCM] Track newly added microphones when [All] is selected in the settings

* [VCM] handle case when no mics are left

* fixup: fix crashes onNotify

* fixup: fix build

src/modules/videoconference/VideoConferenceModule/AudioDeviceNotificationClient.cpp

@@ -0,0 +1,78 @@
+#include "pch.h"
+
+#include "AudioDeviceNotificationClient.h"
+
+AudioDeviceNotificationClient::AudioDeviceNotificationClient()
+{
+    (void)CoCreateInstance(__uuidof(MMDeviceEnumerator), nullptr, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&_deviceEnumerator));
+    if (!_deviceEnumerator)
+    {
+        return;
+    }
+
+    if (FAILED(_deviceEnumerator->RegisterEndpointNotificationCallback(this)))
+    {
+        _deviceEnumerator->Release();
+        _deviceEnumerator = nullptr;
+    }
+}
+
+AudioDeviceNotificationClient::~AudioDeviceNotificationClient()
+{
+    if (!_deviceEnumerator)
+    {
+        return;
+    }
+
+    _deviceEnumerator->UnregisterEndpointNotificationCallback(this);
+    _deviceEnumerator->Release();
+}
+
+ULONG AudioDeviceNotificationClient::AddRef()
+{
+    return 1;
+}
+
+ULONG AudioDeviceNotificationClient::Release()
+{
+    return 1;
+}
+
+HRESULT AudioDeviceNotificationClient::QueryInterface(REFIID, void**)
+{
+    return S_OK;
+}
+
+HRESULT AudioDeviceNotificationClient::OnPropertyValueChanged(LPCWSTR, const PROPERTYKEY)
+{
+    _deviceConfigurationChanged = true;
+    return S_OK;
+}
+
+HRESULT AudioDeviceNotificationClient::OnDeviceAdded(LPCWSTR)
+{
+    _deviceConfigurationChanged = true;
+    return S_OK;
+}
+
+HRESULT AudioDeviceNotificationClient::OnDeviceRemoved(LPCWSTR)
+{
+    _deviceConfigurationChanged = true;
+    return S_OK;
+}
+
+HRESULT AudioDeviceNotificationClient::OnDeviceStateChanged(LPCWSTR, DWORD)
+{
+    _deviceConfigurationChanged = true;
+    return S_OK;
+}
+
+HRESULT AudioDeviceNotificationClient::OnDefaultDeviceChanged(EDataFlow flow, ERole role, LPCWSTR)
+{
+    if (role == eConsole && (flow == eCapture || flow == eAll))
+    {
+        _deviceConfigurationChanged = true;
+    }
+
+    return S_OK;
+}