Add chiungfu@ to OWNERS am: b21fac0c04

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/google/graphics/zuma/+/24309813

Change-Id: I218f062cdb31bc6387d4cdbbefbbbcb1bd287fe0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>