Merge "Cleanup: use shared apex_key" into main am: 3876680a8b am: daed451633

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2780310

Change-Id: I515951d1eca35b8ff1868b26a6523af91f7a60ff
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>