Optimize code generation for add()

[bmunkholm]

In add() you might as well call insert() instead of duplicating the generated code:

public Phone add(String type, String number) {
try {
long position = size();

        insertString(0, position, type);
        insertString(1, position, number);
        insertDone();

        return cursor(position);
    } catch (Exception e) {
        throw addRowException(e);
    }

}

public Phone insert(long position, String type, String number) {
    try {
        insertString(0, position, type);
        insertString(1, position, number);
        insertDone();

        return cursor(position);
    } catch (Exception e) {
        throw insertRowException(e);
    }