Merge "Add OWNERS file for apexkey" into main am: d3c04fd6c3

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2751163

Change-Id: I24d00b74494afeb90602ee958f5d92b3833359fd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>