LiteLLM optional dependency is pinned below patched version for GHSA-4xpc-pv4p-pm3w

[ftnext]

Hi ADK team,

I noticed that google-adk v2.2.0 pins LiteLLM in optional dependencies to litellm>=1.83.7,<=1.83.14. This appears in the extensions and test extras, and the same pin also seems to be present on main.
https://github.com/google/adk-python/blob/v2.2.0/pyproject.toml

LiteLLM recently published a security advisory: GHSA-4xpc-pv4p-pm3w (Critical)
The advisory says versions <1.84.0 are affected, and the patched version is >=1.84.0.

I understand this vulnerability is described as affecting the LiteLLM proxy, so it may not impact all ADK users who install LiteLLM only as a model integration dependency. Still, dependency scanners will likely flag google-adk[extensions] because the current version constraint prevents installing the patched LiteLLM release.

Would it be possible to confirm whether ADK is affected, and if appropriate, relax/update the LiteLLM version constraint to allow >=1.84.0?

Thanks!