Matter of Luviano, 23 I. & N. Dec. 718 (AG Jan. 18, 2005) (firearms conviction expunged pursuant to California state rehabilitative relief statute, Penal Code 1203.4(a), remained a conviction for immigration purposes under the statutory definition of conviction, INA 101(a)(48)(A), 8 U.S.C. 1101(a)(48)(A)).