Migrate 25 crates to monorepo. am: 33bab9581e am: 76fbc19489

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/either/+/3242590

Change-Id: I8daaabb6188d2817e2cf1c702d22ad64c9f20f5f
Signed-off-by: Automerger Merge Worker <[email protected]>