ReminderService: If time is 0, ignore it

Signed-off-by: Fung <fython@163.com>

Author: fython

mobile/src/main/java/info/papdt/express/helper/services/ReminderService.java

@@ -91,7 +91,7 @@ private static Notification buildNotification(Context context, String title, Str
 		builder.setDefaults(defaults);
 		builder.setSmallIcon(icon);
 		builder.setContentIntent(contentIntent);
-		builder.setWhen(time);
+		if (time > 0) builder.setWhen(time);
 		builder.setAutoCancel(true);
 
 		if (Build.VERSION.SDK_INT >= 21) {