* java/org/gnu/emacs/EmacsOpenActivity.java (onCreate): If an empty mailto: URI is supplied, ascertain if EXTRA_EMAIL is set, then derive a mailto URI from that if so.
* java/org/gnu/emacs/EmacsOpenActivity.java (onCreate): If an empty mailto: URI is supplied, ascertain if EXTRA_EMAIL is set, then derive a mailto URI from that if so.