- Abseil
- Protobuf
- Benchmark
- Googletest

In turn, some code changes were necessary:
- Use absolute imports in `sapi_generator.py` when invoked by Bazel
- Add Abseil's source dir as include dir in generated proto `.cc` files
- Bazel: Use `@rules_proto` for `proto_library` and use native `cc_proto_library`

Drive-by:
- Update year in `README.md`
- Look for clang versions 16, 15, 14, and 13 as well in `code.py`
PiperOrigin-RevId: 539032012
Change-Id: Ib9cd1d7fb38409d884eb45e1fa08927f6af83a21