Migrate to cargo_embargo. am: 88037d1910 am: 527dec1d25

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/bitreader/+/2796197

Change-Id: I3f2321c66a6b18fe0ddc9f793cdc1b73e118fd09
Signed-off-by: Automerger Merge Worker <[email protected]>