set preview size to camera hal after we are done with caps negotiation
set preview size to camera hal after we are done with caps negotiation

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