Play an audible notification on receiving a class zero message.

Changes ported from http://review.cyanogenmod.org/#/c/125457/

PAELLA-123

Change-Id: I1289790d32a3b69bf7892025bac5fa3bd74eeefc

src/com/android/messaging/datamodel/BugleNotifications.java

@@ -190,6 +190,15 @@ public class BugleNotifications {
         }
     }
 
+    /**
+     * Play a sound to notify arrival of a class 0 message
+     *
+     */
+    public static void playClassZeroNotification() {
+        final Uri ringtoneUri = RingtoneUtil.getNotificationRingtoneUri(null);
+        playObservableConversationNotificationSound(ringtoneUri);
+    }
+
     /**
      * Cancel all notifications of a certain type.
      *