Merge "aconfig: add exported mode in rust codegen" into main am: 0f1b9da4

Original change: https://android-review.googlesource.com/c/platform/build/+/2881246



Change-Id: I64338cd4e7593ce1e0dc635c4f143974d6142044
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>