Use immutable ashmem bitmaps in screenshot notifications.

            .setColor(r.getColor(com.android.internal.R.color.system_notification_accent_color));

        mNotificationStyle = new Notification.BigPictureStyle()

            .bigPicture(picture);

            .bigPicture(picture.createAshmemBitmap());

        mNotificationBuilder.setStyle(mNotificationStyle);

        // For "public" situations we want to show all the same info but

        // On the tablet, the large icon makes the notification appear as if it is clickable (and

        // on small devices, the large icon is not shown) so defer showing the large icon until

        // we compose the final post-save notification below.

        mNotificationBuilder.setLargeIcon(icon);

        mNotificationBuilder.setLargeIcon(icon.createAshmemBitmap());

        // But we still don't set it for the expanded view, allowing the smallIcon to show here.

        mNotificationStyle.bigLargeIcon((Bitmap) null);

    }