Adds helpers to avoid << use (#29611)

code/modules/admin/verbs/adminpm.dm

@@ -167,7 +167,7 @@
 
 			//play the recieving admin the adminhelp sound (if they have them enabled)
 			if(recipient.prefs.toggles & SOUND_ADMINHELP)
-				recipient << 'sound/effects/adminhelp.ogg'
+				SEND_SOUND(recipient, sound('sound/effects/adminhelp.ogg'))
 
 		else
 			if(holder)	//sender is an admin but recipient is not. Do BIG RED TEXT
@@ -182,7 +182,7 @@
 				admin_ticket_log(recipient, "<font color='blue'>PM From [key_name_admin(src)]: [keywordparsedmsg]</font>")
 
 				//always play non-admin recipients the adminhelp sound
-				recipient << 'sound/effects/adminhelp.ogg'
+				SEND_SOUND(recipient, sound('sound/effects/adminhelp.ogg'))
 
 				//AdminPM popup for ApocStation and anybody else who wants to use it. Set it with POPUP_ADMIN_PM in config.txt ~Carn
 				if(config.popup_admin_pm)
@@ -301,7 +301,7 @@
 
 	window_flash(C, ignorepref = TRUE)
 	//always play non-admin recipients the adminhelp sound
-	C << 'sound/effects/adminhelp.ogg'
+	SEND_SOUND(C, 'sound/effects/adminhelp.ogg')
 
 	C.ircreplyamount = IRCREPLYCOUNT