title: Android app always show app name in toolbar
body: <p>I want to show a specific text in my app toolbar but it also always shows the name of the app too. How can I get rid of the app name and only the text of the <code>TextView</code>?    </p>
  
  <pre><code>&lt;android.support.design.widget.AppBarLayout
      android:layout_height="wrap_content"
      android:layout_width="match_parent"
      android:theme="@style/AppTheme.AppBarOverlay"
      android:fitsSystemWindows="true" &gt;
  
      &lt;android.support.v7.widget.Toolbar
          xmlns:app="http://schemas.android.com/apk/res-auto"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:minHeight="?attr/actionBarSize"
          app:popupTheme="@style/AppTheme.PopupOverlay"
          android:fitsSystemWindows="true" &gt;
  
          &lt;TextView
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:gravity="left"
              android:textAppearance="?android:attr/textAppearanceLarge"
              android:text="The title I want to show"
              android:layout_alignParentTop="true"
              android:layout_alignParentStart="true" /&gt;
  
      &lt;/android.support.v7.widget.Toolbar&gt;
  &lt;/android.support.design.widget.AppBarLayout&gt;
  </code></pre>