Upgrade rust/crates/async-stream to 0.3.1 am: b7cdcf8095 am: 88a5c327ac am: f658afd40c

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/async-stream/+/1712789

Change-Id: Ic6a1b514890d326d1aa2333e5a0b1583599d04ea