fix(6615):prevent silent drop of co-framed tool calls

[llalitkumarrr]

1. Link to an existing issue (if applicable):**

• Closes: Live mode: tool_call can be silently dropped when co-framed with turn_complete in gemini_llm_connection.py #6615

2. Or, if no issue exists, describe the change:

Problem:
A control-flow bug in GeminiLlmConnection.receive() (Issue #6615) caused tool calls to be silently discarded if they were co-framed frame as turn_complete=True. The receive loop encountered an early break when evaluating turn completion, completely bypassing the tool_call block.

Solution:
Rearranged the order of the steps inside the loop. First it gathers all the text and audio, second it looks for any tool calls and safely stores them and finally it checks if the model has finished its turn (turn_complete).

Testing Plan

Added a dedicated async unit test (test_receive_tool_call_and_turn_complete_in_same_message) that mocks a LiveServerMessage containing both server_content (with turn_complete=True) and tool_call in the same payload.