title: When to use MaterialToolbar and androidx Toolbar and the difference between both?
body: <p>When i switched to <em>AndroidX</em> i found that the <code>Toolbar</code> has moved to <code>androidx.appcompat.widget.Toolbar</code> also there is a new <code>MaterialToolbar</code> introduced as <code>com.google.android.material.appbar.MaterialToolbar</code>
  What is the difference between these two and when to use these?</p>