I'd use "notify-osd-icons-elementary" package name because the original package is called "notify-osd-icons". I'd definitely put it in artwork where the rest of the icons is. I'd also add "Suggests: notify-osd-icons-elementary" to elementary-icon-theme package.
I'd use "notify- osd-icons- elementary" package name because the original package is called "notify-osd-icons". I'd definitely put it in artwork where the rest of the icons is. I'd also add "Suggests: notify- osd-icons- elementary" to elementary- icon-theme package.