added firestore to project

android/app/build.gradle

@@ -1,5 +1,8 @@
 plugins {
     id "com.android.application"
+    // START: FlutterFire Configuration
+    id 'com.google.gms.google-services'
+    // END: FlutterFire Configuration
     id "kotlin-android"
     // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
     id "dev.flutter.flutter-gradle-plugin"

android/settings.gradle

@@ -19,6 +19,9 @@ pluginManagement {
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
     id "com.android.application" version "8.1.0" apply false
+    // START: FlutterFire Configuration
+    id "com.google.gms.google-services" version "4.3.15" apply false
+    // END: FlutterFire Configuration
     id "org.jetbrains.kotlin.android" version "1.8.22" apply false
 }