title: Toolbar will not collapse with Scrollview as child of CoordinatorLayout
body: <p>I am trying to follow the Google Docs on using the CoordinatorLayout but i am having an issue with the ScrollView inside the CoordinatorLayout. Basically, the Toolbar normally would collapse with a RecyclerView or a Listview when scrolling down. Now with a ScrollView it will not collapse. </p>
  
  <pre><code>&lt;android.support.design.widget.CoordinatorLayout
      android:layout_width="match_parent"
      android:layout_height="match_parent"&gt;
  
      &lt;ScrollView
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          app:layout_behavior="@string/appbar_scrolling_view_behavior"
          &gt;
  
          &lt;TextView
              android:id="@+id/tv_View"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:layout_gravity="center"
              android:gravity="center"
              android:text="@string/filler"
              style="@style/TextAppearance.AppCompat.Large"
              /&gt;
  
      &lt;/ScrollView&gt;
  
      &lt;android.support.design.widget.AppBarLayout
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          &gt;
          &lt;android.support.v7.widget.Toolbar
              android:id="@+id/toolbar"
              android:layout_width="match_parent"
              android:layout_height="?attr/actionBarSize"
              app:layout_scrollFlags="scroll|enterAlways"
              /&gt;
  
      &lt;/android.support.design.widget.AppBarLayout&gt;
  
      &lt;/android.support.design.widget.CoordinatorLayout&gt;
  </code></pre>