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

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



Change-Id: I6d51b9a245010eddad2394b6ebc77b9206228208
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>