fix(codegen): disambiguate duplicate param names in union-signature proxies

When multiple API versions contribute params with the same name to a
union signature (e.g., attributionSource from API 35 and API 36), the
generated Go code previously emitted duplicate parameter names, causing
compilation errors.

Add disambiguateParams() that detects name collisions and appends
API-level suffixes: _untilAPINN for params with MaxAPILevel,
_sinceAPINN for params with MinAPILevel, and _paramN as a positional
fallback. Apply this in all code paths: interface types, proxy method
signatures, parcel serialization, stub deserialization, and server
wrappers.

Also regenerate bluetooth bindings, CLI commands, and update examples
to match the new signatures.

Author: xaionaro@dx.center