Merge "Cleanup: use a shared apex_key" into main am: b0675a2ecb

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2780307

Change-Id: I7d1c0fd7b39980a83ff6b67d84da14ba68bf4793
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>