`py.typed` but no type annotations

`google.cloud.logging_v2 contains` a `py.typed` file but the package does not provide type annotations.

Hence, code like this:

```py
from google.cloud.logging import Client
from google.cloud.logging.handlers import CloudLoggingHandler
from google.cloud.logging_v2.handlers.handlers import setup_logging

client = Client()
handler = CloudLoggingHandler(client)
setup_logging(handler)
```

will trigger this error in Pyright:

```
test.py:3:55 - error: Type of "setup_logging" is partially unknown
  Type of "setup_logging" is "(handler: Unknown, *, excluded_loggers: Unknown = EXCLUDED_LOGGER_DEFAULTS, log_level: int = logging.INFO) -> None" (reportUnknownVariableType)
```

My interpretation of the meaning of `py.typed` is "this package has type annotations that should be use by the type checker for code importing this package".

Is there any plan to provide type annotations?