Matthew Lawrence “chatted” with Rumer Willis on celebrity dating app Raya. The ‘Mrs. Doubtfire’ star, 44, claims he signed up to the exclusive app “as a joke” before finding love with TLC’s Rozonda ‘Chilli’ Thomas, 53, and the “only person” he can “verify” that he spoke to was Bruce Willis and Demi Moore’s 37-year-old daughter. Rumer found it hilarious that he had “Father of Dragons” on his bio in reference to ‘Game of Thrones’. Speaking on his ‘Brotherly Love’ podcast, he spilled: “I was [on it and] you know the only person who can verify it is Rumer Willis because we’ve chatted on there. “Sh…