LL Cool J, who had a cameo as his "NCIS: Los Angeles" character Sam Hanna during the Season 2 finale of "NCIS: Hawai'i" on CBS, is set to join "NCIS: Hawai'i" as a recurring guest star in the upcoming third season. Season 3 is set to premiere this fall. "All of us at NCIS: Hawai'i…