Merge "rust: Allow rustlibs to fallback to rlibs." am: 3736abfa am:...

Merge "rust: Allow rustlibs to fallback to rlibs." am: 3736abfa am: b6289c9b am: 7cf46f00 am: 61ccb035 am: 9f742c62

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2058050



Change-Id: I0f1e01a19c562a5077a3ac12258c1df52e356f90
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>