Powder snow isn't mined any faster with shovels

The Bug

Powder snow isn't mined any faster with shovels.

Steps to Reproduce

• Summon multiple blocks of powder snow.

  /fill ~1 ~ ~1 ~7 ~ ~7 minecraft:powder_snow
  

• Switch into survival mode, break some of the powder snow with your hand, and as you do this, take note of how fast it's destroyed.
• Now obtain a shovel, break some of the powder snow using it, and take note as to whether or not it's destroyed slower, faster, or at the same speed as using your hand.

Observed Behavior

Powder snow does not have an assigned tool.

Expected Behavior

Powder snow would have an assigned tool. Instead, you should be able to mine powder snow faster when using a shovel.

Code Analysis

Code analysis by Avoma can be found in this comment.