title: Cannot add task ':processDebugGoogleServices' as a task with that name already exists
body: <p>I want to test firebase FCM plugin, but it seems to have a lot of errors,
  after solved many of them, here what I'm 
  trying to do: <code>ionic cordova build android</code>, I have this error:</p>
  
  <p>my build.gradle of Android is: </p>
  
  <pre><code> dependencies {
          classpath 'com.android.tools.build:gradle:2.2.1'
          classpath 'com.google.gms:google-services:3.1.0'
      }
  dependencies {
      compile fileTree(dir: 'libs', include: '*.jar')
      // SUB-PROJECT DEPENDENCIES START
      debugCompile(project(path: "CordovaLib", configuration: "debug"))
      releaseCompile(project(path: "CordovaLib", configuration: "release"))
      compile "com.google.firebase:firebase-core:+"
      compile "com.google.firebase:firebase-messaging:+"
      compile "com.google.android.gms:play-services-maps:9.8.0"
      compile "com.google.android.gms:play-services-location:9.8.0"
      compile "com.android.support:support-v13:23+"
      compile "com.google.android.gms:play-services-gcm:11+"
      compile "me.leolin:ShortcutBadger:1.1.14@aar"
      // SUB-PROJECT DEPENDENCIES END
  }
  apply plugin: 'com.google.gms.google-services'
  </code></pre>
  
  <p>FCMPlugin.gradle :</p>
  
  <pre><code> dependencies {
          classpath 'com.android.tools.build:gradle:+'
          classpath 'com.google.gms:google-services:3.1.0'
      }
  </code></pre>