Merge "Upgrade rust/crates/thiserror-impl to 1.0.20" am: 34a3122583 am: 033ae1ceeb am: 497884ee62

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/thiserror-impl/+/1414399

Change-Id: Ib9831760cc45d5fa305df52139eabf010cad5868