[ALOY-1584] [Android] Ti.UI.Toolbar has no click event on 'displayHomeAsUp' icon when used as ActionBar, but ActionBar allows to close the window on its back-button press.

$.win.activity.supportToolbar = $.toolBarID;

$.win.addEventListener('open', function() {
    //Accessing the properties for ActionBar through it's own API
    $.win.activity.actionBar.displayHomeAsUp = true;
    $.win.activity.actionBar.onHomeIconItemSelected = function() {
      $.win.close();
    }
});

<Alloy>
    <Window title="My Test App" backgroundColor="gray" customToolbar="toolBarID">
        <Toolbar
            id="toolBarID"
            title="MyMenu"
            subtitle="Subtitle"
            extendBackground="true"
            width="Ti.UI.FILL"
            top="0"
            barColor="#639851"
            displayHomeAsUp="true"
            homeButtonEnabled="true"
            overflowIcon="logo.png">

            <!-- The Items tag sets the Toolbar.items property. -->
            <Items>
                <Button id="ok" title="OK"/>
            </Items>
        </Toolbar>

       <View width="Ti.UI.FILL"  height='80' backgroundColor='red' bottom='0' />
    </Window>
</Alloy>