IPixelStreaming2Streamer::OnStreamingStarted

A getter for the OnStreamingStarted event. Intent is for users to call [IPixelStreaming2Module::Get()](API\Plugins\PixelStreaming2\IPixelStreaming2Module\Get).FindStreamer(ID)->[OnStreamingStarted()](API\Plugins\PixelStreaming2\IPixelStreaming2Streamer\OnStreamingStarted).AddXXX.