graphics: update OWNERS

marissaw@ is leaving. jessehall@ is on a different team. Remove
them and add new owners.

Test: Compiles
Bug: 150462113
Change-Id: I922710de701d3923268591bcb48db3e12acb0500
(cherry picked from commit 88417a586b889eec772e3acab5dffaba18a0e678)
12 files changed