title: fitsSystemWindows not working in Custom Layout within NavigationView
body: <p>I have a custom View within the NavigationView. The problem is no matter in what combination, fitsSystemWindows is not working within the NavigationView. and the top item in the drawer always stays behind the transcludent statusbar.</p>
  
  <blockquote>
    <p>main_layout</p>
  </blockquote>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:id="@+id/drawer_layout"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  tools:openDrawer="start"&gt;
  
  &lt;include
      layout="@layout/app_bar_main"
      android:layout_width="match_parent"
      android:layout_height="match_parent" /&gt;
  
  &lt;android.support.design.widget.NavigationView
      android:id="@+id/nav_view"
      android:layout_width="wrap_content"
      android:layout_height="match_parent"
      android:layout_gravity="start"
      android:background="@color/colorPrimaryBottomBar"
      android:fitsSystemWindows="true"&gt;
          &lt;include layout="@layout/navigation_main_drawer" /&gt;
  &lt;/android.support.design.widget.NavigationView&gt;
  &lt;/android.support.v4.widget.DrawerLayout&gt;
  </code></pre>
  
  <blockquote>
    <p>navigation_main_drawer</p>
  </blockquote>
  
  <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"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:fitsSystemWindows="true"&gt;
  
  &lt;ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:clipToPadding="false"
      android:fillViewport="true"
      android:fitsSystemWindows="true"
      android:paddingBottom="@dimen/default_margin"&gt;
  
      &lt;LinearLayout
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:layout_margin="@dimen/default_margin"
          android:fitsSystemWindows="true"
          android:orientation="vertical"&gt;
  
          &lt;LinearLayout
             ...
          &lt;/LinearLayout&gt;
  
          &lt;View
             ... /&gt;
  
          &lt;LinearLayout
             ...
          &lt;/LinearLayout&gt;
  
          &lt;View
             ... /&gt;
  
           &lt;LinearLayout
             ...
          &lt;/LinearLayout&gt;
  
          &lt;View
             ... /&gt;
  
      &lt;/LinearLayout&gt;
  &lt;/ScrollView&gt;
  &lt;/android.support.design.widget.CoordinatorLayout&gt;
  </code></pre>