Migrate to cargo_embargo. am: 88037d1910 am: f380c619e2 am: 09b58a7d12

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

Change-Id: I73496b3ab7ac5c14487a22e66966ceed17ea2744
Signed-off-by: Automerger Merge Worker <[email protected]>