Pig death sound is played when pig converts to zombified piglin

The Bug:

The pig death sound is played when the pig converts to a zombified piglin. This should not happen.

Steps to Reproduce:

1. Summon a pig.
2. Summon a lightning bolt next to the pig you just summoned. 
3. Hopefully the pig becomes a zombified piglin. You will hear a pig death sound, despite the fact the mob did not die.

Expected Result:

No pig death sound is heard upon a pig converting to a zombified piglin.

Observed Result:

A pig death sound is heard upon a pig converting to a zombified piglin.