Upgrade async-stream-impl to 0.3.4 am: 542806003b am: d275319ec6 am: 6e66b26c56 am: 85d9b06ef5 am: 3a9a02c20f

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/async-stream-impl/+/2466093

Change-Id: I6c2d7d851e0392477561feba5c42277a0465afa4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>