Third person attack animation is played constantly

The player's animation controller file defines "attack.position" and "attack.rotations" to be used whenever "variable.attack_time" is greater than or equal to 0. However, the inclusion of 0 means the animation is constantly used even when the player isn't attacking, which is not really noticeable with the vanilla animation (because of MCPE-47940) but is an inconvenience for any custom animations. This can be fixed by defining it to be used whenever "variable.attack_time" is greater than 0.

Steps to reproduce

1. Apply MCPE-167696.mcpack to a world, and open the world.
2. Switch to third person.
3. Press attack button.

Expected result

The arm and head look normal when not attacking, then snap to a 45 degree angle during the attack and go back to their default positions after the attack is finished.

Observed result

The arm and head stay at a 45 degree angle for the entire duration of your session.