[TIMOB-19722] [TIMOB-19579] (5_1_X) Android: Backport, fixes NullPointerException in TiConvert

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Backport fix for JIRA https://jira.appcelerator.org/browse/TIMOB-19722

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Accepted

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Code for testing:

var window = Ti.UI.createWindow({backgroundColor: "white"});
var view = Ti.UI.createView({});
var view2 = Ti.UI.createView({width: 100, height: 100, backgroundColor: "yellow"});
view.add(view2);
var button = Ti.UI.createButton({title: "Hide/show view w/ circular animation"});
button.addEventListener("click", function(e) {
    if (view.visible) {
        view.hide();
    } else {
        view.show();
    }
});
window.add(view);
window.add(button);
window.open();