Revert "Revert "mixed builds correctly reference stubs libs"" am: 75dbca2e am: 939ef922

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2549932



Change-Id: Ia8e8315c6f42ee37164ee41493042dd07111c192
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>