title: Android CollapsingToolbarLayout title - top margin bug
body: <p>CollapsingToolbarLayout title have a strange top margin but only when it is collapsed and only when inside a fragment.
  Prior to the 25.0.0 version of Design Support Library everything worked fine.</p>
  
  <p>Video: <a href="https://www.youtube.com/watch?v=7WUrFhmvs_Q&amp;feature=youtu.be" rel="noreferrer">https://www.youtube.com/watch?v=7WUrFhmvs_Q&amp;feature=youtu.be</a></p>
  
  <p>XML: </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
                                               xmlns:app="http://schemas.android.com/apk/res-auto"
                                               android:layout_width="match_parent"
                                               android:layout_height="match_parent"
                                               android:fitsSystemWindows="true"&gt;
  
  &lt;android.support.design.widget.AppBarLayout
      android:layout_width="match_parent"
      android:layout_height="256dp"
      android:fitsSystemWindows="true"
      android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"&gt;
  
      &lt;android.support.design.widget.CollapsingToolbarLayout
          android:id="@+id/collapsing_toolbar_layout"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:fitsSystemWindows="true"
          app:contentScrim="?attr/colorPrimary"
          app:layout_scrollFlags="scroll|exitUntilCollapsed"&gt;
  
          &lt;ImageView
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:fitsSystemWindows="true"
              android:scaleType="centerCrop"
              android:src="@drawable/image_placeholder"
              app:layout_collapseMode="parallax"/&gt;
  
          &lt;android.support.v7.widget.Toolbar
              android:layout_width="match_parent"
              android:layout_height="?attr/actionBarSize"
              app:layout_collapseMode="pin"/&gt;
  
      &lt;/android.support.design.widget.CollapsingToolbarLayout&gt;
  
  &lt;/android.support.design.widget.AppBarLayout&gt;
  
  &lt;android.support.v4.widget.NestedScrollView
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      app:layout_behavior="@string/appbar_scrolling_view_behavior"&gt;
  
      &lt;TextView
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:layout_margin="16dp"
          android:text="Lorem ipsum dolor sit amet enim ..."
          android:textSize="20sp"/&gt;
  
  &lt;/android.support.v4.widget.NestedScrollView&gt;
  
  
  &lt;/android.support.design.widget.CoordinatorLayout&gt;
  </code></pre>
  
  <p>Fragment :</p>
  
  <pre><code>public class TestFragment extends Fragment {
  
  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
      super.onCreateView(inflater, container, savedInstanceState);
  
      View view = inflater.inflate(R.layout.test_fragment, container, false);
  
      return view;
  }
  
  @Override
  @CallSuper
  public void onViewCreated(View view, Bundle savedInstanceState) {
      super.onViewCreated(view, savedInstanceState);
  
      CollapsingToolbarLayout toolbarLayout = (CollapsingToolbarLayout) view.findViewById(R.id.collapsing_toolbar_layout);
      toolbarLayout.setTitle("Lorem Ipsum");
  }
  
  }
  </code></pre>
  
  <p>Any ideas? </p>