MANILA, Philippines—AJ Edu is slowly making his mark with the Gunma Crane Thunders, and former NBA journeyman Stanley Johnson has taken notice. Johnson is still finding his way with Gunma after leaving Nagasaki Velca, but he already likes what Edu brings to the Crane Thunders. “He adds a lot of size to our lineup. He has his rebounding, versatility and finishing,” Johnson said after Gunma’s 101-91 overtime win over Levanga Hokkaido at Mall of As…