Change the style of MenuItem on android toolbar

Question

I'm using android toolbar for my application actionbar. It has an action button which has 2 MenuItems like this:

Now I'm trying to change the style of the MenuItems to represent something like the following:

But I can only change the textColor and font by using this style as my toolbar's theme android:theme="@style/AppTheme.ActionBar":

<style name="AppTheme.ActionBar" parent="AppTheme">

    <item name="android:fontFamily">@font/my_font</item>
    <item name="android:textColor">@color/White</item>

</style>

How can I change the gravity of the text to stick to the end of the line ?

I tried these on my style and no success:

<item name="android:gravity">end</item>
<item name="android:layout_gravity">end</item>
<item name="android:gravity">right</item>
<item name="android:layout_gravity">right</item>