build.gradle

// top of the file
apply plugin: 'com.android.application' 
apply plugin: 'com.google.gms.google-services'

dependencies {
  ... // already some dependencies are here

  // Import the Firebase BoM
  implementation platform('com.google.firebase:firebase-bom:31.2.3')

  // TODO: Add the dependencies for Firebase products you want to use
  // When using the BoM, don't specify versions in Firebase dependencies
  implementation 'com.google.firebase:firebase-analytics-ktx'
}