The old Scaredy Kat spot on 5th Avenue between President and Carroll has a new tenant coming: A Vietnamese sandwich and bubble tea shop is filling the small space, according to a sign that’s gone up in the window. If the rumor about the other banh mi place on 5th Avenue turns out to be true, that’ll mean there are four banh mi joints in the Slope, two on 5th Ave and two on 7th. GMAP