Adds Sprites for Some Armalis+Vox Gear & Species-fitting Inhand Icons, etc.

Adds sprites for all Vox & Armalis earwear
Adds sprites for Armalis default backpack, nitrogen tank (non-'emergency' back & belt) all breathmask variations

Fixes an issue where Vox Armalis wouldn't be rendered with the proper in-hand icons for their massive noise cannons.
Fixes an issue where you couldn't species-fit earwear.
Fixes an issue where Vox Armalis couldn't wear the 'Vox' breath mask.

code/game/objects/items/devices/radio/headset.dm

@@ -4,6 +4,10 @@
 	var/radio_desc = ""
 	icon_state = "headset"
 	item_state = "headset"
+	sprite_sheets = list(
+		"Vox" = 'icons/mob/species/vox/ears.dmi',
+		"Vox Armalis" = 'icons/mob/species/armalis/ears.dmi'
+		) //We read you loud and skree-er.
 	materials = list(MAT_METAL=75)
 	subspace_transmission = TRUE
 	canhear_range = 0 // can't hear headsets from very far away