Fix the media button style to use dip instead of px.

    <style name="MediaButton">

        <item name="android:background">@android:drawable/media_button_background</item>

        <item name="android:layout_width">71px</item>

        <item name="android:layout_height">52px</item>

        <item name="android:layout_width">71dip</item>

        <item name="android:layout_height">52dip</item>

    </style>

    <style name="MediaButton.Previous">