Merge "Cleanup: use shared apex_key" into main am: a232f9f196

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2780369

Change-Id: I4214962686e1782d971ad5982a1f8ed496359258
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>