droidcamsrc: correct debugging output for gst_droidcamsrc_dev_enable_face_detection()
droidcamsrc: correct debugging output for gst_droidcamsrc_dev_enable_face_detection()

This function can be used to disable face detection too despite its name

sailfishos/gst-droid,mlehtima/gst-droid,foolab/gst-droid,mlehtima/gst-droid,foolab/gst-droid