Given a sequence of estimators $\hat{\theta}_n$ for a parameter $\theta$, if the estimator satisfies $\sqrt{n}(\hat{\theta}_n - \theta) \xrightarrow{d} N(0, V)$, what is the asymptotic distribution of $\sqrt{n}(\hat{\theta}_n^2 - \theta^2)$ assuming $\theta > 0$?