How to make the distance between left edge of Toolbar and Search Icon same as that between the right edge of the toolbar and the Cancel Icon?

Question

I am trying to add a SearchView to Material Design Toolbar/ActionBar such that the SearchView is expanded by default and

Answer 1

I believe that

    android:contentIntentStart="0dp"
    android:contentIntentLeft="0dp"
    app:contentIntentStart="0dp"
    app:contentIntentLeft="0dp"

was meant to be

    android:contentInsetStart="0dp"
    android:contentInsetLeft="0dp"
    app:contentInsetStart="0dp"
    app:contentInsetLeft="0dp"