Tweak searchbar padding

    <!-- The following two margins need to match, with the caveat that

         the second should be negative. The second one ensures that the icons and text

         align despite the additional padding caused by the search bar's card background. -->

    <dimen name="search_bar_margin">8dp</dimen>

    <dimen name="search_bar_negative_margin">-8dp</dimen>

    <dimen name="search_bar_margin">16dp</dimen>

    <dimen name="search_bar_negative_margin">-16dp</dimen>

    <dimen name="search_bar_height">48dp</dimen>

    <dimen name="search_bar_corner_radius">2dp</dimen>