platform add android doesn't have proper repository config

Unclear on if this is the correct place to categorize this issue, but the fix is simple. 

By default, when setting up a new project: 

```

cordova create cordova com.example.test CordovaTest

cordova platform add android --save

```

The resulting build.gradle does not provide the appropriate google maven repository to pull from given the android 3.0 gradle plugin. 

 

According to: https://developer.android.com/studio/build/gradle-plugin-3-0-0-migration

your gradle build script configuration for the Adroid 3.0 plugin should look something like:

```

buildscript {
     repositories

{            jcenter()            maven \{ url "http://jcenter.bintray.com"}

     google() // <<---- HAD TO ADD THIS!!!
     }
}

````

 

I've listed the problem as minor since Android Studio immediately realizes the issue and even gives you the option to fix it automatically, but i've been hacking purely from the CLI and kept getting cryptic errors like: "unable to find valid certification path to requested target".