Rolled up armadillo can be pushed

Rolled up armadillos can be pushed. This looks very unnatural and strange. It is also inconsistent with the camel, which cannot be pushed when sitting down.

Steps to reproduce:

1. Create a world with the 'Armadillo and Wolf Armor' experimental toggle enabled.
2. Run '/summon armadillo'
3. Sprint near the armadillo so it rolls up
4. Attempt to push it and see that it moves

You can also summon a camel, wait for it to sit down, then try to push the camel and see that it will not move.

Video of bug: https://youtu.be/DkgNKzmhCec