title: Ionic Android Build Failing
body: <p>I'm trying to build this application (I have successfully built the iOS version)</p>
  
  <p>When I run ionic cordova build android I get following output</p>
  
  <pre><code>  FAILURE: Build failed with an exception.
  
          * What went wrong:
          A problem occurred configuring root project 'android'.
          &gt; Could not resolve all dependencies for configuration ':_armv7DebugCompile'.
             &gt; Could not find any matches for com.google.android.gms:play-services-ads:+ as no versions of com.google.android.gms:play-services-ads are available.
               Searched in the following locations:
                   https://repo1.maven.org/maven2/com/google/android/gms/play-services-ads/maven-metadata.xml
                   https://repo1.maven.org/maven2/com/google/android/gms/play-services-ads/
                   https://jcenter.bintray.com/com/google/android/gms/play-services-ads/maven-metadata.xml
                   https://jcenter.bintray.com/com/google/android/gms/play-services-ads/
                   https://download.01.org/crosswalk/releases/crosswalk/android/maven2/com/google/android/gms/play-services-ads/maven-metadata.xml
                   https://download.01.org/crosswalk/releases/crosswalk/android/maven2/com/google/android/gms/play-services-ads/
                   file:/C:/Android/android-sdk/extras/android/m2repository/com/google/android/gms/play-services-ads/maven-metadata.xml
                   file:/C:/Android/android-sdk/extras/android/m2repository/com/google/android/gms/play-services-ads/
               Required by:
                   :android:unspecified
  
          * Try:
          Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
  
          BUILD FAILED
  
          Total time: 19.489 secs
          Error: cmd: Command failed with exit code 1 Error output:
          FAILURE: Build failed with an exception.
  
          * What went wrong:
          A problem occurred configuring root project 'android'.
          &gt; Could not resolve all dependencies for configuration ':_armv7DebugCompile'.
             &gt; Could not find any matches for com.google.android.gms:play-services-ads:+ as no versions of com.google.android.gms:play-services-ads are available.
               Searched in the following locations:
                   https://repo1.maven.org/maven2/com/google/android/gms/play-services-ads/maven-metadata.xml
                   https://repo1.maven.org/maven2/com/google/android/gms/play-services-ads/
                   https://jcenter.bintray.com/com/google/android/gms/play-services-ads/maven-metadata.xml
                   https://jcenter.bintray.com/com/google/android/gms/play-services-ads/
                   https://download.01.org/crosswalk/releases/crosswalk/android/maven2/com/google/android/gms/play-services-ads/maven-metadata.xml
                   https://download.01.org/crosswalk/releases/crosswalk/android/maven2/com/google/android/gms/play-services-ads/
                   file:/C:/Android/android-sdk/extras/android/m2repository/com/google/android/gms/play-services-ads/maven-metadata.xml
                   file:/C:/Android/android-sdk/extras/android/m2repository/com/google/android/gms/play-services-ads/
               Required by:
                   :android:unspecified
  
          * Try:
          Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
  </code></pre>