Add more Gatekeeper OWNERS am: b75cfb13cd am: f2d3abde2f am: 17f770e1c2

Original change: https://android-review.googlesource.com/c/platform/system/gatekeeper/+/2477516

Change-Id: Ied2db003fdefb9ea2d5b31ebead25be164b7a238
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>