Player's head uses default rotations when crawling

Steps to Reproduce:

1. Enable the Short Sneak and Crawling experiment;
2. Get into a crawling position;
3. Enter third person view.

Observed Results:
The head rotates freely, resulting in very unnatural and uncomfortable looking rotations (see attached picture).

Expected Results:
The head rotates similarly to the swimming animation.

Screenshots/Videos attached: Yes

Notes: This can be fixed by changing the humanoids' look_at_target animation controller to use the swimming one whenever variable.swim_amount > 0.0 instead of using query.is_swimming. This also fixes the transition of the head when going from swimming to standing not being smooth.