Reland "Truely re-export export_header_libs from ndk_library" am: bedc997c

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/3253699



Change-Id: I98e976866f29d5cbf5e5bb4e771557b04c4f49cd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>