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.
      *

src/com/android/messaging/ui/ClassZeroActivity.java

@@ -33,6 +33,7 @@ import android.view.Window;
 
 import com.android.messaging.R;
 import com.android.messaging.datamodel.action.ReceiveSmsMessageAction;
+import com.android.messaging.datamodel.BugleNotifications;
 import com.android.messaging.util.Assert;
 
 import java.util.ArrayList;
@@ -88,6 +89,8 @@ public class ClassZeroActivity extends Activity {
             return false;
         }
         mMessageQueue.add(messageValues);
+        // Show a notification to let the user know a new message has arrived
+        BugleNotifications.playClassZeroNotification();
         return true;
     }