title: inflate menu in CollapsingToolbarLayout issue
body: <p>I am using the design support library`s CollapsingToolbarLayout.My issue is i am not able to inflate the menu action icon in toolbar. I am using the below code to create CollapsingToolbarLayout.</p>
  
  <pre><code>&lt;android.support.design.widget.AppBarLayout
      android:id="@+id/app_bar_layout"
      android:layout_width="match_parent"
      android:layout_height="240dp"&gt;
  
      &lt;android.support.design.widget.CollapsingToolbarLayout
          android:id="@+id/collapsing_toolbar"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:fitsSystemWindows="true"
          app:contentScrim="?attr/colorPrimary"
          app:expandedTitleMarginBottom="32dp"
          app:expandedTitleMarginEnd="64dp"
          app:expandedTitleMarginStart="48dp"
          app:layout_scrollFlags="scroll|exitUntilCollapsed"&gt;
          &lt;ImageView
              android:id="@+id/profile_image"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:fitsSystemWindows="true"
              android:scaleType="centerCrop"
              app:layout_collapseMode="parallax" /&gt;
          &lt;android.support.v7.widget.Toolbar
              android:id="@+id/toolbar"
              android:layout_width="match_parent"
              android:layout_height="?attr/actionBarSize"
              app:layout_collapseMode="pin"
              app:popupTheme="@style/ThemeOverlay.AppCompat.Light" /&gt;
      &lt;/android.support.design.widget.CollapsingToolbarLayout&gt;
  
  
  &lt;/android.support.design.widget.AppBarLayout&gt;
  </code></pre>
  
  <p>In Fragment i use </p>
  
  <pre><code> @Override
  public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
      inflater.inflate(R.menu.menu_emp_details, menu);
      super.onCreateOptionsMenu(menu,inflater);
  }
  </code></pre>
  
  <p>and <code>setHasOptionsMenu(true);</code></p>