Upgrade tracing to 0.1.40 am: 4647cbe7f8 am: 36344b2173

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/tracing/+/2952525

Change-Id: Ic7d6625bcd4ab74659578381273c2f1651c7f3df
Signed-off-by: Automerger Merge Worker <[email protected]>