You can use snow layers to see through opaque blocks

Found while testing MCPE-154945. Very closely relates to its Java Edition equivalent MC-149375.

The bug

The third person camera appears to use snow's collision box rather than its apparent physical size, allowing for X-raying.

As this bug was fixed in Java Edition 1.16, this is a parity issue.

Steps to reproduce

1. Place a snow layer
2. Enter third person view
3. Attempt to position the camera inside of the snow layer

Expected results

The three snow layers would be treated as a cuboid 3/8 of a block tall by the camera and accordingly considered solid.

Actual results

The camera goes inside of the snow layers as if they were never there.