[touch] Can't record with front facing camera

Using "position: Camera.FrontFace" does nothing on Touch images. The sample qml app below continues to use the back camera.

=======

import QtQuick 2.4
import QtMultimedia 5.4
import Ubuntu.Components 1.3

MainView {
    id: root
    applicationName: "testing.testing"

    width: units.gu(100)
    height: units.gu(75)

    Page {
        title: i18n.tr("Testing")

        VideoOutput {
            anchors.fill: parent
            source: camera

            Camera {
                id: camera
                position: Camera.FrontFace
            }
        }
    }
}