Merge "aconfig: disable export mode for generated native flag libraries" into main am: 1fdf9f22

Original change: https://android-review.googlesource.com/c/platform/build/+/2982315



Change-Id: I21640eb3e0225e5cfa13c3cb30b5ec7c1ea59444
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>