MainActivity kotlin code for twilio voice sdk integration in android app built with React native

MainActivity.kt

package com.androidapp

import com.facebook.react.ReactActivity
import com.facebook.react.ReactActivityDelegate
import com.facebook.react.defaults.DefaultNewArchitectureEntryPoint.fabricEnabled
import com.facebook.react.defaults.DefaultReactActivityDelegate
import android.Manifest
import android.content.Intent
import android.os.Build
import android.os.Bundle
import android.widget.Toast
import com.twiliovoicereactnative.VoiceActivityProxy

class MainActivity : ReactActivity() {

  private val activityProxy = VoiceActivityProxy(this) { permission ->
    when (permission) {
        Manifest.permission.RECORD_AUDIO -> Toast.makeText(
            this@MainActivity,
            "Microphone permissions needed. Please allow in your application settings.",
            Toast.LENGTH_LONG
        ).show()
        Manifest.permission.BLUETOOTH_CONNECT ->
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
                Toast.makeText(
                    this@MainActivity,
                    "Bluetooth permissions needed. Please allow in your application settings.",
                    Toast.LENGTH_LONG
                ).show()
            }
        Manifest.permission.POST_NOTIFICATIONS ->
            if (Build.VERSION.SDK_INT > Build.VERSION_CODES.S_V2) {
                Toast.makeText(
                    this@MainActivity,
                    "Notification permissions needed. Please allow in your application settings.",
                    Toast.LENGTH_LONG
                ).show()
            }
    }
}

override fun onCreate(savedInstanceState: Bundle?) {
  super.onCreate(savedInstanceState)
  activityProxy.onCreate(savedInstanceState)
}

override fun onDestroy() {
  activityProxy.onDestroy()
  super.onDestroy()
}

override fun onNewIntent(intent: Intent?) {
  super.onNewIntent(intent)
  activityProxy.onNewIntent(intent)
}

  /**
   * Returns the name of the main component registered from JavaScript. This is used to schedule
   * rendering of the component.
   */
  override fun getMainComponentName(): String = "REPLACE_WITH_YOUR_APP_NAME"

  /**
   * Returns the instance of the [ReactActivityDelegate]. We use [DefaultReactActivityDelegate]
   * which allows you to enable New Architecture with a single boolean flags [fabricEnabled]
   */
  override fun createReactActivityDelegate(): ReactActivityDelegate =
      DefaultReactActivityDelegate(this, mainComponentName, fabricEnabled)
}