[AC-2704] Android: TableViewRow selectedBackgroundImage doesn't back to backgroundColor when is transparent

Hello, I have a TableView with many TableViewSections. My TableViewRows have backgroundColor as *transparent*, and the *selectedBackgroundColor* as #6E2E1C, this is an example:

var tableViewRow = Ti.UI.createTableViewRow({
	className: "fuu",
	backgroundColor: "transparent",
	selectedBackgroundColor: "#6E2E1C"
});

When the row is clicked, the backgroundColor is changed to selectedBackgroundColor, but the backgroundColor never backs to transparent. It only happens when used with backgroundColor transparent. If we set a backgroundColor different (like #FF0000) to TableViewRow, it works perfeclty.