public boolean bindVpnService(ServiceConnection c) {
        if (!mContext.bindService(new Intent(ACTION_VPN_SERVICE), c, 0)) {
            Log.e(TAG, "failed to connect to VPN service");
            return false;
        } else {
            Log.e(TAG, "succeeded to connect to VPN service");
            return true;
        }
    }

ACTION_VPN_SERVICE는 "package명.SERVICE"  이고요
c는 ServiceConnection c = new ServiceConnection() 입니다.

답변 부탁드림 ㅠ
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