Migrate 25 crates to monorepo. am: bea8d6f357

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/flagset/+/3243861

Change-Id: I10ceb516f7f1cc4628f38e22a7775f7ce16e7c9d
Signed-off-by: Automerger Merge Worker <[email protected]>