Fire BlockPreDispenseEvent for droppers (#10226)

patches/server/Add-BlockPreDispenseEvent.patch

@@ -16,6 +16,18 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                      DispenserBlock.eventFired = false; // CraftBukkit - reset event status
                      tileentitydispenser.setItem(i, idispensebehavior.dispense(sourceblock, itemstack));
                  }
+diff --git a/src/main/java/net/minecraft/world/level/block/DropperBlock.java b/src/main/java/net/minecraft/world/level/block/DropperBlock.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/level/block/DropperBlock.java
++++ b/src/main/java/net/minecraft/world/level/block/DropperBlock.java
+@@ -0,0 +0,0 @@ public class DropperBlock extends DispenserBlock {
+                     ItemStack itemstack1;
+ 
+                     if (iinventory == null) {
++                        if (!org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockPreDispenseEvent(world, pos, itemstack, i)) return; // Paper - Add BlockPreDispenseEvent
+                         itemstack1 = DropperBlock.DISPENSE_BEHAVIOUR.dispense(sourceblock, itemstack);
+                     } else {
+                         // CraftBukkit start - Fire event when pushing items into other inventories
 diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
 --- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java