fix(android): animation freezes when file has ViewModels but no artboard default

[mfazekas]

Fixes #189.

In Auto dataBind mode, Android passed autoBind=true to setRiveFile whenever viewModelCount > 0. If the artboard had no default ViewModel assigned, the Rive SDK threw "No default ViewModel found for artboard", freezing the animation.

Fix: always pass autoBind=false for Auto mode and let bindToStateMachine handle binding — it already catches ViewModelException gracefully when no default ViewModel exists.

Note on the error log: The artboard name in the error ("iPhone 16 Pro - 3") is just how Rive names artboards in responsive layout files — it's not iOS code. The bug is Android-only.

Reproducer

.riv file: https://rive.app/community/files/27026-50856-no-default-vm-for-artboard/

import { RiveView, useRiveFile } from '@rive-app/react-native';

export default function Reproducer() {
  const { riveFile } = useRiveFile(require('./nodefaultbouncing.riv'));

  return riveFile ? (
    <RiveView
      file={riveFile}
      autoPlay={true}
      // No dataBind prop — defaults to Auto. On Android (unfixed) this
      // triggers "No default ViewModel found for artboard" and freezes.
      style={{ flex: 1 }}
    />
  ) : null;
}

Expected: animation plays normally on both platforms.
Actual (Android, unfixed): animation freezes, ViewModelInstanceNotFound error fired via onError.

[HayesGordon]

LGTM