mte: add nnk@google.com to OWNERS am: b7d645e1b4

Original change: https://android-review.googlesource.com/c/device/google/gs-common/+/3320735

Change-Id: I045ae89a04542e70933a9a986c0d24255e0ae59f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>