Merge "Cleanup: use shared apex_key" into main am: 254c650c am: d109330b

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2780409



Change-Id: I34aa754f7312b7f9f8d64eaaca350d8da7e4a45c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>