docs: change intro and title for contacts and sign-in lesson, and remove empty bullet

page.title=Building Apps with User Info & Location

page.title=Building Apps with Contacts & Sign-In

page.trainingcourse=true

@jd:body

<p>These classes teach you how to add user personalization to your app. Some of the ways

you can do this is by identifying users, providing

information that's relevant to them, and providing information about the world around them.</p>

 No newline at end of file

<p>These lessons teach you how to include contact information and authenticate users with the same 

credentials they use for Google. These features allow your app to connect users with people they 

care about and provide a personalized experience without creating new user accounts.</p>

    <li>

        Define ListView and item layouts.

    </li>

    <li>

    <li>

        Define a Fragment that displays the list of contacts.

    </li>

    <div class="nav-section-header">

      <a href="<?cs var:toroot ?>training/building-userinfo.html">

      <span class="small">Building Apps with</span><br/>

              User Info & Sign-In

              Contacts & Sign-In

      </a>

    </div>

    <ul>