Merge "vm: DRY *Config structs w.r.t. aflags using cfg_if" into main am: 7df9609888

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/3251462

Change-Id: I442f594efbffdae3965bc9630f4556514e1b7e2e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>