Migrate to cargo_embargo. am: e2d1b9e3f6 am: 6e7aa0fc86 am: 1c029fcac0

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/bitflags/+/2862465

Change-Id: I047df4616404ec966507d79b166dba3749a133d5
Signed-off-by: Automerger Merge Worker <[email protected]>