[TIMOB-14879] Android: webview loading spinning indicator is not shown setting/not setting a backgroundColor

var win = Ti.UI.createWindow({
    title:'test'
});
 
var data=[{title:'open pdf!'}];
 
var tw = Ti.UI.createTableView({
    data:data
});
 
 
tw.addEventListener('click', function(e){
    var webview = Titanium.UI.createWebView({
        backgroundColor:'white',
        url:'http://www.appcelerator.com/assets/The_iPad_App_Wave.pdf'});
    var win2 = Titanium.UI.createWindow();
    win2.add(webview);
    win2.open({modal:true});
});
 
 
win.add(tw);
 
win.open();