macOS: eliminate startup warning

```
    WARNING: Add NSCameraUseContinuityCameraDeviceType to your Info.plist to use AVCaptureDeviceTypeContinuityCamera.
```

Author: naussika

SerialPrograms/cmake/MacOSXBundleInfo.plist.in

@@ -32,6 +32,8 @@
 	<string>${MACOSX_BUNDLE_COPYRIGHT}</string>
 	<key>NSCameraUsageDescription</key>
 	<string>The cameras are listed to choose the Switch video stream from the captrue card.</string>
+	<key>NSCameraUseContinuityCameraDeviceType</key>
+	<true/>
 	<key>NSMicrophoneUsageDescription</key>
 	<string>The microphones are listed to choose the Switch audio stream from the captrue card.</string>
 </dict>