Merge "Move signing related options to a shared place" into main am: 5003ff74 am: ccdb708c

Original change: https://android-review.googlesource.com/c/platform/build/+/2828703



Change-Id: Ia7a098b2cd88b3591832e41b810c7f95c9f3af8f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>