add Wallet Instant Buy and Google Cloud Platform to the Google services landing page.

<div style="margin-top:10px">

<div class="col-6 normal-links" style="margin-left:0">

  </div>

    <h4><a href="{@docRoot}google/play-services/maps.html"

    >Google Maps</a></h4>

    <p>The power of Google Maps is available to your app

    <p>Include the power of Google Maps in your app

    with an embeddable map view. You can customize the map with

    markers and overlays, control the user's perspective, draw lines

    and shapes, and much more.</p>

    and add +1 buttons so users can recommend your content.</p>

</div>

<div class="landing-cell">

  <div class="cell-icon">

  <img src="{@docRoot}images/google/cloud-platform.png" width="40" >

  </div>

    <h4><a class="external-link" href="https://cloud.google.com/solutions/mobile"

    >Google Cloud Platform</a></h4>

    <p>Build and host the backend for your Android app at Google-scale. With an infrastructure

    that is managed automatically, you can focus on your app. Then, scale to support

    millions of users.</p>

</div>

<div class="landing-cell">

  <div class="cell-icon">

  <img src="{@docRoot}images/google/gcm-cloud.png" width="40" >

    </p>

</div>

<div class="landing-cell">

  <div class="cell-icon">

    <img src="{@docRoot}images/google/wallet.png" width="40" />

  </div>

    <h4><a class="external-link" href="https://developers.google.com/commerce/wallet/instant-buy/"

    >Google Wallet Instant Buy</a></h4>

    <p>Provide fast and easy checkout in your app when selling physical goods and services.

    Increase conversions by streamlining your purchase flow and reducing the amount of

    information your customers need to enter.

    </p>

</div>

<div class="landing-cell">

  <div class="cell-icon">

<img src="{@docRoot}images/google/analytics.png" width="40" />