Project level 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:4.3.10'
}
}
allprojects {
  ...
  repositories {
    // Check that you have the following line (if not, add it):
    google()  // Google's Maven repository
...
  }
}