title: How to reduce the gap between navigation icon and toolbar title?
body: <p>My problem is the extra space between the nav-drawer icon and toolbar title. The sample images are below:</p>
  
  <p><img src="https://i.stack.imgur.com/fUr26.png" alt="spacing between nav-drawer icon and title"></p>
  
  <p><img src="https://i.stack.imgur.com/zWxIM.png" alt="spacing between back icon and toolbar"></p>
  
  <p>The xml view of the toolbar is</p>
  
  <pre><code>&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:titleTextAppearance="@style/Toolbar.TitleText"
          app:popupTheme="@style/AppTheme.PopupOverlay" /&gt;
  </code></pre>
  
  <p>I have tried to solve this problem by using code below but no change occurred.</p>
  
  <pre><code>@Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_home);
      Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
      setSupportActionBar(toolbar);
  
      //toolbar.setTitleMarginStart(0);
      toolbar.setTitleMarginStart(-8);
  }
  </code></pre>
  
  <p>Is there any way to solve this problem ?</p>