Zendaya has a few more days to wear something blue. The actor, promoting “The Drama” with co-star Robert Pattinson around the globe, has — wink wink — worn something old, something new and something borrowed. It all fits with the wedding theme of “The Drama,” opening Friday, about a Boston couple whose impending nuptials are thrown into chaos by a dark revelation. Of course, it also dovetails with the bridal theme of Zendaya’s own life, with unconfirmed speculation flying — fed in part by rings