Merge "aconfig: add list_flag api cxx interlop" into main am: 9d21525b

Original change: https://android-review.googlesource.com/c/platform/build/+/3079587



Change-Id: Iaf5a2975c1aa18285d83ec030f7a96bb97a890be
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>