title: Add Icon to the left of the title in the action bar in android
body: <p>I want to add a clickable icon/button to the left of the title in the action bar . How to do it?
  Following is the code with which I have added search and setting icon to the action bar. They appear on the right. But i want to add a new icon to the left of title. How to do it?
  XML :</p>
  
  <pre><code>    &lt;menu 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"
          tools:context=".ui.home.activities.TransactionSearchActivity"&gt;
  
      &lt;item
          android:id="@+id/action_search"
          android:icon="@android:drawable/ic_menu_search"
          android:title="search"
          app:actionViewClass="android.support.v7.widget.SearchView"
          app:showAsAction="always" /&gt;
  
      &lt;item android:id="@+id/action_setting"
          android:title="categories"
          android:icon="@drawable/icon_settings_h"
          app:showAsAction="always"
      /&gt;
  </code></pre>
  
  <p>MAIN ACTIVITY</p>
  
  <pre><code>     @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
      }
  
      public boolean onCreateOptionsMenu(Menu menu) {
          MenuInflater inflater = getMenuInflater();
          inflater.inflate(R.menu.main_menu, menu);
          return true;
      }
  </code></pre>