Import crc32fast-1.2.1 am: 9f04d26dc4 am: 43aced41b9 am: 467ec3265a

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/crc32fast/+/1587991

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I8f0962858401a4b0eff9aff525341b0034b707a2