“Stowaway,” a Netflix sci-fi and drama movie starring Toni Collette, took Nielsen’s top spot for all films on streaming during the week of April 19, toppling the Melissa McCarthy comedy “Thunder Force” that had held the No. 1 slot for several weeks.“Stowaway” was viewed for 359 million minutes during the week of April 19-25 after debuting on Netflix on April 22, according to the latest streaming figures from Nielsen.