[MC-176758] Tamed mules show heart particles after being fed, even though they cant breed

Tamed mules will show heart particles after being fed, despite the fact that they are not able to breed.

Steps to Reproduce:

Run this command twice to summon two tamed mules
```
/summon mule ~ ~ ~ {Tame:1b}
```
Feed both mules an item they like
```
/give @p golden_carrot
```

Observed Results:

The mules will both display heart particles.

Expected Results:

The mules would not show heart particles, as they are not in love and will not breed.

Screenshots/Videos:

MC-176758 Current Behavior.mp4

Code Analysis / MCP-Reborn 1.20.2

Here in the handleEntityEvent() method of Animal.java, the game first checks to see if the event id is equal to 18 (18 is the "IN_LOVE_HEARTS" event) and if that is true, then the heart particles are displayed around the entity. However, it never checks to see if that entity is capable of breeding.

 Class: net\minecraft\world\entity\animal\Animal.java - Method: handleEntityEvent()

   public void handleEntityEvent(byte eventId) {
      if (eventId == 18) {
         for(int i = 0; i < 7; ++i) {
            double z1 = this.random.nextGaussian() * 0.02D;
            double z2 = this.random.nextGaussian() * 0.02D;
            double z3 = this.random.nextGaussian() * 0.02D;
            this.level().addParticle(ParticleTypes.HEART, this.getRandomX(1.0D), this.getRandomY() + 0.5D, this.getRandomZ(1.0D), z1, z2, z3);
         }
      } else {
         super.handleEntityEvent(eventId);
      }
   }

Possible Fix

A possible fix for this issue, is to do the following two things:

Add an extra check inside of the handleEntityEvent() method to see if the entity is capable of falling in love before displaying the particles

   public void handleEntityEvent(byte eventId) {
Fix Start
      if (eventId == 18 && this.canFallInLove()) {
Fix End
         for(int i = 0; i < 7; ++i) {
            double d0 = this.random.nextGaussian() * 0.02D;
            double d1 = this.random.nextGaussian() * 0.02D;double d2 = this.random.nextGaussian() * 0.02D;
            this.level().addParticle(ParticleTypes.HEART, this.getRandomX(1.0D), this.getRandomY() + 0.5D, this.getRandomZ(1.0D), d0, d1, d2);
         }
      } else {
         super.handleEntityEvent(eventId);
      }
   }

Inside the Mule.java class, override the "canFallInLove()" method, and return false.

   public boolean canFallInLove() {
      return false;
   }

This fix provides the following behavior:
MC-176758 Fix.mp4