title: Child inside NestedScrollView not cover full height of screen
body: <p>I am using NestedScrollView in my fragment. In my xml inside a RelativeLayout but it is not covering full height of screen.</p>
  
  <p>Below is my code - </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:fitsSystemWindows="true"
  android:background="@color/black"
  android:layout_width="match_parent"
  android:layout_height="match_parent"&gt;
  
  &lt;RelativeLayout
      android:background="@color/red_error_color"
      android:layout_width="match_parent"
      android:layout_height="match_parent"&gt;
  
  
  &lt;/RelativeLayout&gt;
  &lt;/android.support.v4.widget.NestedScrollView&gt;
  </code></pre>
  
  <p>when run the code only black background is visible but not red as my child view background is red.</p>
  
  <p>Thanks in advance</p>