SPIGOT-2864: Make Arrow / Item setTicksLived behave like FallingBlock

By: md_5 <git@md-5.net>

paper-server/nms-patches/EntityItem.patch

@@ -1,6 +1,6 @@
 --- a/net/minecraft/server/EntityItem.java
 +++ b/net/minecraft/server/EntityItem.java
-@@ -3,6 +3,10 @@
+@@ -3,16 +3,21 @@
  import java.util.Iterator;
  import java.util.UUID;
  import javax.annotation.Nullable;
@@ -11,7 +11,11 @@
  
  public class EntityItem extends Entity {
  
-@@ -13,6 +17,7 @@
+     private static final DataWatcherObject<ItemStack> b = DataWatcher.a(EntityItem.class, DataWatcherRegistry.g);
+-    private int age;
++    public int age; // PAIL
+     public int pickupDelay;
+     private int e;
      private UUID f;
      private UUID g;
      public float a;