Upgrade rust/crates/env_logger to 0.8.1 am: 775f0ab2cd am: 87f1b7df87

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/env_logger/+/1474958

Change-Id: I30067c17e454d4d835512c7be8e4c0344f81487a