Migrate 25 crates to monorepo. am: c34c2889fd

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/num-traits/+/3248252

Change-Id: Ib9a9189be07ab447997db8aa612c762d27d202c3
Signed-off-by: Automerger Merge Worker <[email protected]>