Lily pads can be placed inside entities

The bug

This is not a duplicate of MCPE-32638, but it clones that ticket. This is a parity issue, since this was fixed for java in 1.16. MC-667 Normally you can’t place blocks inside yourself or other entities, however lily pads can be placed inside entities.

How to reproduce:

1. Go into a sea or an ocean and be at the top of the water

2. Try to place a lily pad inside yourself
   Observed Result: The lily pad is placed and you will get pushed away from it.
   Expected Result: The lily pad doesn’t get placed, since it would be placed inside you.