docs: studio 1.3.1 revision updates

<p>The sections below provide notes about successive releases of

Android Studio, as denoted by revision number. </p>

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  <p><a href="#" onclick="return toggleContent(this)">

    <img src="{@docRoot}assets/images/triangle-opened.png" class="toggle-content-img"

      alt=""/>Android Studio v1.3.1</a> <em>(August 2015)</em>

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    <p>Fixes and enhancements:</p>

    <ul>

      <li>Fixed support for creating an Android Wear Android Virtual Device (AVD) on Windows. </li>

      <li>Updated the <em>Project Wizard</em> to use the entered project name.  </li>

      <li>Added support to allow the Android SDK to be stored in a read-only directory.  </li>

      <li>Updated Android Plugin for Gradle version to 1.3.0. </li>

      <li>Fixed issues with launching a debug session from the Android Debug Bridge (adb) Unix

        shell.  </li>

      <li>Fixed the Java package renaming message to show the correct package name. </li>

    </ul>

  </div>

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  <p><a href="#" onclick="return toggleContent(this)">

    <img src="{@docRoot}assets/images/triangle-closed.png" class="toggle-content-img"

      alt=""/>Android Studio v1.3.0</a> <em>(July 2015)</em>

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