What worked for me was:
And then follow the https://console.firebase.google.com steps to do in android studio:
Project-level build.gradle (/build.gradle):
buildscript {
  repositories {
    // Check that you have the following line (if not, add it):
    google()  // Google's Maven repository
  }
  dependencies {
    ...
    // Add this line
    classpath 'com.google.gms:google-services:4.3.8'
  }
}
allprojects {
  ...
  repositories {
    // Check that you have the following line (if not, add it):
    google()  // Google's Maven repository
    ...
  }
}
App-level build.gradle (//build.gradle):
apply plugin: 'com.android.application'
// Add this line
apply plugin: 'com.google.gms.google-services'
dependencies {
  // Import the Firebase BoM
  implementation platform('com.google.firebase:firebase-bom:28.3.0')
  // Add the dependency for the Firebase SDK for Google Analytics
  // When using the BoM, don't specify versions in Firebase dependencies
  implementation 'com.google.firebase:firebase-analytics'
  // Add the dependencies for any other desired Firebase products
  // https://firebase.google.com/docs/android/setup#available-libraries
}
Finally, press "Sync now" in the bar that appears in the IDE: