音频文件头解析信息（艺术家、名称）为乱码

语言设置为英文，扫描时是不进行编码设置的。修改为默认编码方式为简体中文即可
1、MediaScannerClient.cpp在void MediaScannerClient::setLocale(const char* locale)方法中加入一个判断语句
void MediaScannerClient::setLocale(const char* locale)
{
 LOGE("MediaScannerClient.cpp->MediaScannerClient::setLocale，本地编码格式： %s\n", locale);
    if (!locale) return;

    if (!strncmp(locale, "ja", 2))
        mLocaleEncoding = kEncodingShiftJIS;
    else if (!strncmp(locale, "ko", 2))
        mLocaleEncoding = kEncodingEUCKR;
    else if (!strncmp(locale, "zh", 2)) {
        if (!strcmp(locale, "zh_CN")) {
            // simplified chinese for mainland China
            mLocaleEncoding = kEncodingGBK;
        } else {
            // assume traditional for non-mainland Chinese locales (Taiwan, Hong Kong, Singapore)
            mLocaleEncoding = kEncodingBig5;
        }
    }else{
         mLocaleEncoding = kEncodingGBK;
    }
}