How to modify http request headers？ about cronet-transport-for-okhttp HOT 7 CLOSED

import android.content.ClipData
import android.content.ClipboardManager
import android.content.Context
import android.os.Bundle
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import com.google.net.cronet.okhttptransport.CronetInterceptor
import okhttp3.*
import org.chromium.net.CronetEngine
import java.io.IOException


class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val engine = CronetEngine.Builder(applicationContext).build()
        val callFactory = OkHttpClient().newBuilder()
            .addInterceptor(CronetInterceptor.newBuilder(engine).build())
            .build()
        val request=Request.Builder()
            .url("https://www.google.com/")
            .header("User-Agent","Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:98.0) Gecko/20100101 Firefox/98.0")
            .header("Accept-Encoding","gzip, deflate, br")
            .header("Accept","text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8")
            .build()
        callFactory.newCall(request).enqueue(object : Callback {
            override fun onFailure(call: Call, e: IOException) {
            }

            override fun onResponse(call: Call, response: Response) {
                runOnUiThread{
                    var contentEncoding=response.headers.get("Content-Encoding")
                    if(contentEncoding.isNullOrEmpty()){
                        contentEncoding="identity"
                    }
                    Toast.makeText(applicationContext,response.protocol.toString()+"\n"+contentEncoding+"\nEncoding:"+response.toString(),
                        Toast.LENGTH_SHORT).show()
                    copyToClipboard(applicationContext,"",response.body!!.string())
                }
            }
        })
    }
    fun copyToClipboard(context: Context, label: String?, text: String?) {
        val clipboardManager: ClipboardManager =
            context.getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
                ?: return
        clipboardManager.setPrimaryClip(ClipData.newPlainText(label, text))
    }
}