Wolf armor can only be repaired while it is sitting down

Description:
Relates to MC-268815.

Steps to Reproduce:

1. Tame a wolf and give it armor
2. Allow it to take damage
3. Interact with it while holding an armadillo scute

Observed Results:
If the wolf is standing up, it will sit down on the first interaction and only then the repairing can happen.

Expected Results:
The armor is repaired regardless of whether the wolf is sat or not.