Implement a left margin on the home icon

Trying to solve the use case where the action bar up is not enabled but the home icon is centered. Generally this requires creating a custom home layout and overriding (otherwise the left margin isn't quite right), but this allows that margin to be overriden by using a custom style like this:

    <?xml version="1.0" encoding="utf-8"?>
    <resources>
        <style name="Theme.Styled" parent="Theme.Sherlock.Light.DarkActionBar">
            <item name="actionBarStyle">@style/Widget.Styled.ActionBar</item>
            <item name="android:actionBarStyle">@style/Widget.Styled.ActionBar</item>
            <item name="homeAsUpIndicator">@null</item>
            <item name="android:homeAsUpIndicator">@null</item>
        </style>
        
        <style name="Widget.Styled.ActionBar" parent="Widget.Sherlock.Light.ActionBar.Solid.Inverse">
            <item name="homeAsUpIndicator">@null</item>
            <item name="android:homeAsUpIndicator">@null</item>
        </style>
        
        <dimen name="abs__action_bar_icon_left_margin">12dip</dimen>
    </resources>