Fix: type safety in Android build configuration for React Native directory resolution

[benjaminpeters]

Summary

Setting REACT_NATIVE_NODE_MODULES_DIR = file("$rootDir/$NODE_MODULES_DIR/react-native") will throw class java.io.File cannot be cast to class java.lang.String (java.io.File and java.lang.String are in module java.base of loader 'bootstrap')

Changes

• Updated resolveReactNativeDirectory() function in both react-native-reanimated and
  react-native-worklets Android build files
• Replaced unsafe string casting with proper type checking using Kotlin's when expression
• Now handles multiple possible types for REACT_NATIVE_NODE_MODULES_DIR:
  • File objects (returned as-is)
  • String values (converted to File)
  • Other types (converted to string then File)

Why

The previous code assumed REACT_NATIVE_NODE_MODULES_DIR would always be a String and used an unsafe cast (as String?). This could cause ClassCastException at runtime if the property was set to a different type (like a File object).

Test plan

• Verify Android builds complete successfully
• Test with different monorepo configurations
• Confirm no regressions in React Native directory resolution