Add more Gatekeeper OWNERS am: b75cfb13cd am: f2d3abde2f am: 17f770e1c2 am: 1c5b886c0b

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

Change-Id: Id6638283b76a2ebe053cc3529e3ded55728e61e2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>