Slimes' and Magma Cubes' attack sounds are unused

Slimes and Magma Cubes don't play sounds when attacking in Bedrock, even though these sounds are in the game. You can see this by running the command /playsound mob.slime.attack

Step to Reproduce:

1. Spawn a Slime or a Magma Cube
2. Go into survival
3. Get attacked by the Slime/Magma Cube

Expected Result:
The attack sound plays

Observed Result:
The attack sound doesn't play