am 34ca9ece: Hide Clock dream nav bar when started from the Clock app

        <item name="android:statusBarColor">@color/status_bar</item>

    </style>

    <style name="ScreensaverActivityTheme"

           parent="@android:style/Theme.Material.Wallpaper.NoTitleBar" />

    <style name="ScreensaverActivityTheme" parent="@android:style/Theme.Material.NoActionBar">

        <!-- Hide navigation bar when Dream is started from within the Clock app -->

        <item name="android:windowDrawsSystemBarBackgrounds">false</item>

    </style>

    <style name="ScreensaverSettingsActivityTheme" parent="@android:style/Theme.Material" />