perf(neovi): drop redundant int casts in NetworkID packing

Root cause:
`send()` converted expressions to `int(...)` even though bitwise operations on
Python ints already produce ints. The extra calls add tiny but unnecessary
overhead in a transmit hot path.
Implemented solution:
- Replace:
  `int(network_id & 0xFF), int((network_id >> 8) & 0xFF)`
  with:
  `network_id & 0xFF, (network_id >> 8) & 0xFF`
Rationale vs alternatives:
This is a no-risk micro-optimization and cleanup with identical semantics.
Performance evidence:
- Evidence type: Python operation semantics and call-overhead analysis.
- Expected impact: Low but positive for high-frequency sends.
Test methodology:
- Session functional validation:
  `python -m pytest test/test_neovi.py` -> passed.
Assumptions, limitations, risks:
- `network_id` remains integer-valued as enforced by existing channel parsing.
Potential follow-ups:
- Include send-heavy throughput profiling to quantify aggregate impact.
Other identified optimizations not implemented in this commit:
- Additional zero-copy opportunities require ICS API support.

Author: Pierre-Luc Tessier Gagne

can/interfaces/ics_neovi/neovi_bus.py

@@ -532,9 +532,7 @@ def send(self, msg, timeout=0):
         else:
             raise ValueError("msg.channel must be set when using multiple channels.")
 
-        message.NetworkID, message.NetworkID2 = int(network_id & 0xFF), int(
-            (network_id >> 8) & 0xFF
-        )
+        message.NetworkID, message.NetworkID2 = network_id & 0xFF, (network_id >> 8) & 0xFF
 
         if timeout != 0:
             msg_desc_id = next(description_id)