Upgrade tokio-util to 0.7.10 am: a7879fe083

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/tokio-util/+/2950425

Change-Id: If80db06d7ac2be560713c61ae717d03ae2fcb068
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>