Make libloading available to product and vendor am: 1270bf741a am: 92e958f168

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/libloading/+/2476418

Change-Id: Id7f8108034adbfd035be0c6eadf6cc14951413cc
Signed-off-by: Automerger Merge Worker <[email protected]>