Enable the sync feature am: 7a36e08608

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/tokio-stream/+/3061022

Change-Id: I3c2ca91d760afb8d0d14b8462d3faeda0dabb3e0
Signed-off-by: Automerger Merge Worker <[email protected]>