title: Toolbar is not visible in android 4.4 tablet
body: <p>I have following layout in this I am adding a toolbar. Everything looks fine in Android 6.0 phones. I just tried it on android 4.2 tablet and the toolbar is not seen. here is my layout :</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"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:fitsSystemWindows="true"
      tools:context="com.android.sushil.omdbclient.ui.main.MoviesList.MoviesListActivity"&gt;
  
      &lt;android.support.design.widget.AppBarLayout
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"&gt;
  
          &lt;android.support.v7.widget.Toolbar
              android:id="@+id/toolbar"
              android:layout_width="match_parent"
              android:layout_height="?attr/actionBarSize"
              android:background="?attr/colorPrimary"
              app:popupTheme="@style/ThemeOverlay.AppCompat.Light" /&gt;
  
      &lt;/android.support.design.widget.AppBarLayout&gt;
  
      &lt;RelativeLayout
          android:layout_width="match_parent"
          android:layout_height="match_parent"&gt;
  
          &lt;ProgressBar
              android:id="@+id/main_progress"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:visibility="gone"
              android:layout_gravity="center"/&gt;
  
          &lt;android.support.v7.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
              android:id="@+id/recycler_view"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:background="@color/windowBackground"
              android:paddingTop="?attr/actionBarSize"
              android:visibility="visible"&gt;
  
          &lt;/android.support.v7.widget.RecyclerView&gt;
  
          &lt;TextView
              android:id="@+id/message"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_centerInParent="true"
              android:text="@string/search_to_begin"
              android:textSize="16sp"
              android:visibility="visible" /&gt;
  
          &lt;!--&lt;include layout="@layout/error_layout"/&gt;--&gt;
      &lt;/RelativeLayout&gt;
  
  &lt;/android.support.design.widget.CoordinatorLayout&gt;
  </code></pre>
  
  <p>If I change the coordinator layout with Linearlayout, I can see the toolbar. But can someone tell me how can I fix this without replacing the coordinator layout with Linerlayout.</p>
  
  <p>Thanks for any help.</p>