Android : Ensure Android's Overflow button does not come up on my Actionbar

I implemented the overflow button myself using the following base XML:

<?xml version="1.0" encoding="utf-8"?>

<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:id="@+id/action_settings"
        android:orderInCategory="100"
        android:title="Settings"
        android:icon="@drawable/ic_action_overflow"
        android:showAsAction="always">
        <menu>
            <item
                android:id="@+id/action_logout"
                android:title="Log out"
                android:showAsAction="never" />
            <item
                android:id="@+id/action_offer_advice"
                android:title="Advice"
                android:showAsAction="never" />
        </menu>
    </item>

    <item
        android:id="@+id/action_create"
        android:title="Create"
        android:icon="@drawable/ic_action_new"
        android:showAsAction="always"/>



</menu>

I did this because I want the Overflow button to be on every Android device regardless of a physical menu button. I opted for this over the hacky solution offered many times across Stackoverflow. That being said, I'm a bit fuzzy with ActionBars and I want to be positive that Android's default overflow won't show up for users that don't have a physical menu button. It would be very awkward to have my implementation of the overflow button with Android's default one right next to it.

Am I worrying over nothing? Is this a legitimate concern? If it is a legitimate concern, what could I do to handle that?