Switch to HexEncoding from ByteStringUtils

import android.content.Context;

import android.os.Process;

import android.os.ServiceManager;

import android.util.ByteStringUtils;

import android.util.EventLog;

import android.util.Log;

import com.android.server.pm.dex.DynamicCodeLogger;

import libcore.util.HexEncoding;

import java.util.ArrayList;

import java.util.List;

import java.util.concurrent.TimeUnit;

    }

    private static String unhex(String hexEncodedPath) {

        byte[] bytes = ByteStringUtils.fromHexToByteArray(hexEncodedPath);

        if (bytes == null || bytes.length == 0) {

        if (hexEncodedPath == null || hexEncodedPath.length() == 0) {

            return "";

        }

        byte[] bytes = HexEncoding.decode(hexEncodedPath, false /* allowSingleChar */);

        return new String(bytes);

    }

}