Makes wrist item sprites contained (#19210)

The main reason for this was because Bulwark wrist icon states were not
working as intended and I wasn't able to figure out why. There aren't
that many wrist items to begin with so hopefully it is okay.

code/modules/clothing/wrists/watches.dm

@@ -4,9 +4,6 @@
 	desc_extended = "For those who want too much time on their wrists instead."
 	icon_state = "watch"
 	item_state = "watch"
-	sprite_sheets = list(
-		BODYTYPE_VAURCA_BULWARK = 'icons/mob/species/bulwark/wrist.dmi'
-	)
 	var/wired = TRUE
 	var/screwed = TRUE
 

code/modules/clothing/wrists/wrists.dm

@@ -2,11 +2,7 @@
 /obj/item/clothing/wrists
 	name = "wrists"
 	w_class = ITEMSIZE_TINY
-	icon = 'icons/obj/clothing/wrists.dmi'
-	item_icons = list(
-		slot_l_hand_str = 'icons/mob/items/clothing/lefthand_wrists.dmi',
-		slot_r_hand_str = 'icons/mob/items/clothing/righthand_wrists.dmi'
-		)
+	icon = 'icons/obj/item/clothing/wrists/wrist.dmi'
 	sprite_sheets = list(
 		BODYTYPE_VAURCA_BULWARK = 'icons/mob/species/bulwark/wrist.dmi'
 	)
@@ -16,6 +12,7 @@
 	siemens_coefficient = 1.0
 	var/flipped = 0
 	var/mob_wear_layer = WRISTS_LAYER_OVER
+	contained_sprite = TRUE
 
 /obj/item/clothing/wrists/update_clothing_icon()
 	if (ismob(src.loc))