title: google-services.json cannot be found
body: <p>I have put the google service json file at <code>android/app/src</code>
  buh I get this error:</p>
  
  <pre><code>Could not find google-services.json while looking in [src/nullnull/debug, src/debug/nullnull, src/nullnull, src/debug, src/nullnullDebug]
  registerResGeneratingTask is deprecated, use registerGeneratedFolders(FileCollection)
  Could not find google-services.json while looking in [src/nullnull/release, src/release/nullnull, src/nullnull, src/release, src/nullnullRelease]
  registerResGeneratingTask is deprecated, use registerGeneratedFolders(FileCollection)
  Could not find google-services.json while looking in [src/nullnull/profile, src/profile/nullnull, src/nullnull, src/profile, src/nullnullProfile]
  registerResGeneratingTask is deprecated, use registerGeneratedFolders(FileCollection)
  
  dependencies {
      classpath 'com.android.tools.build:gradle:3.0.1'
      classpath 'com.google.gms:google-services:4.0.0'
  }
  </code></pre>