[TIMOB-1536] Android: TabGroup.activeTab returns index when should be tab object, AND index is wrong

Test case app.js:

Titanium.UI.setBackgroundColor('#000');
var tabGroup = Titanium.UI.createTabGroup();

for (var i = 0; i < 4; i++) {
    var win = Ti.UI.createWindow({
        title: 'Tab ' + i,
        backgroundColor: '#fff'
    });
    var tab = Ti.UI.createTab({
        title: 'Tab ' + i,
        window: win
    });
    tabGroup.addTab(tab);
}

tabGroup.addEventListener('focus', function(e) {    
    Ti.API.info('tabGroup.activeTab: ' + tabGroup.activeTab);
    Ti.API.info('tabGroup.activeTab.title: ' + tabGroup.activeTab.title);
});
        
tabGroup.open();

tabGroup.activeTab will return index of the previous tab you were on, not the activeTab. In fact, according to our docs, it should return the tab object of the current tab.