Update Android.bp by running cargo_embargo am: 620db91928

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/protobuf-json-mapping/+/3208912

Change-Id: Ie5babbe8286cade31298bde69e2d176db826c600
Signed-off-by: Automerger Merge Worker <[email protected]>