How can I change the height of a Xamarin Forms NavigationPage Toolbar?

I am trying to change the height of a Xamarin Forms Toolbar that is being rendered on Android with AppCompat. There is no height property from Forms to set this so I've attempted setting the layout_height in the toolbar.axml as follows

<android.support.v7.widget.Toolbar
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="128dp"
    android:minHeight="?attr/actionBarSize"
    android:background="?attr/colorPrimary"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
    app:layout_scrollFlags="scroll|enterAlways" />

This doesn't change the height.

I've also tried setting

• android:minHeight
• android:height
• height
• android:actionBarSize

but those do not change the height either. I've also tried using a custom renderer and setting height of the element their too, but with no luck.

FWIW, when using Xamarin Forms non-AppCompat NavigationPage with the ActionBar, I was able to set the height with android:height using a custom renderer.