Merge "Add variant of libtokio for test" am: 9c455c5ce5 am: fcf80050cf am: 27904a8853 am: b247446eae

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/tokio/+/2475668

Change-Id: I6cf1906e734ded9d9ded53f159df477ac0e5d5cf
Signed-off-by: Automerger Merge Worker <[email protected]>