Migrate 25 crates to monorepo. am: 97e242be02

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/mls-rs-codec/+/3248551

Change-Id: I2dd02abe65a47a053bbcfa4f438e6d84056c4596
Signed-off-by: Automerger Merge Worker <[email protected]>