reach-qml-viewer: merge qml-viewer-init recipe into reach-qml-viewer

Signed-off-by: Steve Sakoman <steve@sakoman.com>
packagegroup-qml-viewer: create packagegroup for qml-viewer, sio-agent, and tio-agent

also remove those packages from packagegroup-reach-qt4e

Signed-off-by: Steve Sakoman <steve@sakoman.com>
reach-image-qt4e: add new packagegroup-qml-viewer to image

Signed-off-by: Steve Sakoman <steve@sakoman.com>