Add support for Gemini Live 3.8 extended thinking model #8616

What feature would you like to see?

Add APIs for to liveGenerationConfig for thinking_level, and other new APIs for https://ai.google.dev/gemini-api/docs/live-api/capabilities like:

• interaction_status
• turnComplete
• thinking_level (note this must be omitted for gemini-3.8-live)
• on tool definitions: add the "behavior": "NON_BLOCKING" field (must be non_blocking for all Live Thinking tools)

More info here: https://ai.google.dev/gemini-api/docs/live-api/thinking#adopting-thinking