[ALOY-1127] Alloys Data Binding feature does not respect formFactor property

<Alloy>
    <Collection src="test" />
    <Window id="index" platform="ios" formFactor="tablet">
        <View id="content" dataCollection="test" dataFunction="render">
            <View></View>
        </View>
    </Window>
    <Window id="index" platform="ios" formFactor="handheld">
        <TableView>
            <TableViewRow dataCollection="test" dataFunction="render">
                <View></View>
            </TableViewRow>
        </TableView>
    </Window>
</Alloy>

$.index.addEventListener('open', function () {
    $.destroy();
});
 
$.index.open(); 
 
render();

exports.definition = {
 
  configuration : {
    "columns": {
      "username":"string"
    },
    "adapter": {
      "type": "sql",
      "collection_name": "test"
    },
  },
 
  extendModel: function(Model) {
 
    _.extend(Model.prototype, {});
 
    return Model;
  },
 
  extendCollection: function(Collection) {
 
    _.extend(Collection.prototype, {});
 
    return Collection;
  }
}

exports.destroy = function() {
    __alloyId5.off("fetch destroy change add remove reset", render);
    __alloyId12.off("fetch destroy change add remove reset", render);
};

'undefined' is not an object (evaluating '__alloyId5.off')