Enabled DND for all new message notifications by default

app/src/main/java/eu/faircode/email/TupleFolderEx.java

@@ -96,6 +96,7 @@ public class TupleFolderEx extends EntityFolder implements Serializable {
                 NotificationManager.IMPORTANCE_HIGH);
         channel.setGroup(group.getId());
         channel.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
+        channel.setBypassDnd(true);
         channel.enableLights(true);
         nm.createNotificationChannel(channel);
     }