CameraRecordingUtils: PictureCaptured Unity event is called before the image actually is captured

`m_PictureCaptured.Invoke()` is called `OnPhotoModeStarted`, but the image is not finished capturing before `onCapturedPhotoToDisk`.

```c#
....
// line 102
m_PictureCaptured.Invoke();
 if (saveImage) SaveImage();
...
```