PreviewView is not aligned to center

[Satheeshkummari]

[Satheeshkummari]

if we move the previewView with fitCenter, the landmarks are not in synch, the mechanism to center the canvas drawing is required

[Mikkelet]

This feels like a general problem with all the samples; they're very fragile and will seemingly only work in a very specific configuration. If you tilt the device to landscape, change the view-centric scaling, or use a different aspect ratio, the entire overlay is out of sync. This is especially annoying when working with tablets!!