Update to 0.12.1 am: 05a37eb749 am: b6260349af am: 116ae871ea

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/hashbrown/+/2145788

Change-Id: I67a8d9080d30a28873744594ac9ca472181c2eeb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>