title: ActionBarDrawerToggle icon missing when using AppCompat v22
body: <p>I'm using Appcompat v22 to use tinted style for AutoCompleteTextView. 
  However, as soon as I changed my build.gradle from this: </p>
  
  <pre><code>compile 'com.android.support:support-v4:21.0.3'
  compile 'com.android.support:appcompat-v7:21.0.3'
  compile 'com.android.support:cardview-v7:21.0.2'
  compile 'com.android.support:recyclerview-v7:21.0.2'
  </code></pre>
  
  <p>to this: </p>
  
  <pre><code>compile 'com.android.support:support-v4:22.0.0'
  compile 'com.android.support:appcompat-v7:22.0.0'
  compile 'com.android.support:gridlayout-v7:22.0.0'
  compile 'com.android.support:cardview-v7:22.0.0'
  </code></pre>
  
  <p>The ActionBarDrawerToggle Icon (Hamburger icon) goes missing. (However, if I slide from left, the drawer gets revealed)</p>
  
  <p>Inside onCreate():</p>
  
  <pre><code>    mDrawerLayout = (BBDrawerLayout) findViewById(R.id.drawer_layout);
      mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
      mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
              R.string.drawer_open, R.string.drawer_close) {
          @Override
          public void onDrawerClosed(View drawerView) {
              super.onDrawerClosed(drawerView);
              toolbar.setTitle(mTitle);
              invalidateOptionsMenu();
          }
  
          @Override
          public void onDrawerOpened(View drawerView) {
              super.onDrawerOpened(drawerView);
              trackEvent(TrackingAware.MENU_SHOWN, null);
              toolbar.setTitle(mDrawerTitle);
              invalidateOptionsMenu();
          }
      };
  
      mDrawerLayout.setDrawerListener(mDrawerToggle);
  </code></pre>
  
  <p>Have also called syncState()</p>
  
  <pre><code>@Override
  protected void onPostCreate(Bundle savedInstanceState) {
      super.onPostCreate(savedInstanceState);
      if (mDrawerToggle != null) {
          mDrawerToggle.syncState();
      }
  }
  
  @Override
  public void onConfigurationChanged(Configuration newConfig) {
      super.onConfigurationChanged(newConfig);
      if (mDrawerToggle != null) {
          mDrawerToggle.onConfigurationChanged(newConfig);
      }
  }
  </code></pre>
  
  <p>If I downgrade the appcompat version back to 21.0.3, everything starts to work.</p>