Smooth property not managed in VideoSink/VideoFrame

Currently the VideoOutput QML completely ignores the smooth parameter, however the Image QML don't.

Inside the qImageFromVideoFrame() in qvideoframeconverter module, when a new QRhi is created, the QRhiSampler (textureSampler) is forced to QRhiSampler::Linear for magFilter, minFilter and mipmapMode and to QRhiSampler::Nearest in the Android version, ignoring the smooth property from VideoOutput -> VideoSink.