Revert Cargo.toml and fix Floss build failure am: 8d18993b am: f81e66fe...

Revert Cargo.toml and fix Floss build failure am: 8d18993b am: f81e66fe am: fdc0317b am: c17b86eb

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2082238



Change-Id: Ie0306e0145dce4c844956c0d12dc99853f858f9d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>