Upgrade async-stream to 0.3.4 am: 4b13b9fde6 am: f675554708 am: 6c2c412e88 am: d1645c6446

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/async-stream/+/2467320

Change-Id: I26726c7de19f9208442fce198a3aacb2c07f0a40
Signed-off-by: Automerger Merge Worker <[email protected]>