Brian Steinberg Senior TV EditorLast year, Dolly Parton contributed a song for a Super Bowl commercial. This year, she’s raised her game, by appearing in two.The iconic singer and songwriter was planning to be at home Sunday night watching NBC’s broadcast of Super Bowl LVI with plenty of snacks, dips and wings on hand so she could see her performance in two short Big Game commercials from T-Mobile.“I have to watch it this year, ‘cause I’m in it,” Parton quipped during a phone interview earlier this week.Parton debuts alongside Miley Cyrus, making a rare joint appearance with the singer who also happens to be her goddaughter (see their past antics in episodes of Cyrus’ Disney Channel mainstay “Hannah Montana”) for T-Mobile, the telecommunications carrier.