Problem with adding firebase to my android app

I attempting to add Firebase to my Android app and I faced this problem with configuring root project 'android'
here is the error
And this code for project/build.gradle

buildscript {
ext.kotlin_version = '1.7.10'
repositories {
google()
mavenCentral()
}
dependencies {
classpath 'com.android.tools.build:gradle:7.3.0'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
classpath 'com.google.gms.google-services:4.2.0'
}
}
allprojects {
repositories {
google()
mavenCentral()
}
}
rootProject.buildDir = '../build'
subprojects {
project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
project.evaluationDependsOn(':app')
}
tasks.register("clean", Delete) {
delete rootProject.buildDir
}

And this code for app/build.gradle

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
localPropertiesFile.withReader('UTF-8') { reader ->
localProperties.load(reader)
}
}
def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}
def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
flutterVersionCode = '1'
}
def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
flutterVersionName = '1.0'
}
apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
android {
namespace "com.example.water_reminder_app"
compileSdkVersion flutter.compileSdkVersion
ndkVersion flutter.ndkVersion
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
kotlinOptions {
jvmTarget = '1.8'
}
sourceSets {
main.java.srcDirs += 'src/main/kotlin'
}
defaultConfig {
// TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
applicationId "com.fatima_hure.water_reminder_app"
// You can update the following values to match your application needs.
// For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
minSdkVersion flutter.minSdkVersion
targetSdkVersion flutter.targetSdkVersion
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
}
buildTypes {
release {
// TODO: Add your own signing config for the release build.
// Signing with the debug keys for now, so `flutter run --release` works.
signingConfig signingConfigs.debug
}
}
}
flutter {
source '../..'
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
}

I tried to change the version number classpath 'com.google.gms.google-services: 4.2.0' also, I tried adding Firebase plugins to an Android project using the buildscript syntax but this not work too. anyone can know how to fix this problem

Ok so I have searched about it and it seems that firebase has updated their firebase integration now their are two ways to integrate with firebase one is with 1. buildscript(so by default you will have buildscript) in buildscript method also they have changed the code for integration and other one is with 2. plugin(new one) you can check it out by going to your firebase project settings and than scroll down you will see on "See SDK instruction" button click on it and there you will find new way to integrate it.
Troubleshoot & FAQ link
https://shorturl.at/auAIP

Other than this you can also use flutterfire CLI it's much better and easy way to integrate firebase to you flutter app here is the guidance link if you want to check it out
https://codewithandrea.com/articles/flutter-firebase-flutterfire-cli/