Migrate 25 crates to monorepo. am: ec6d55b189

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/libloading/+/3243630

Change-Id: Ic00d3d004a8d034168fc2b63369eeb9153a4a7b4
Signed-off-by: Automerger Merge Worker <[email protected]>