[native_toolchain_c] NDK resolution fails if `.DS_Store` exists

`file:///Users/dacoharkes/Library/Android/sdk/ndk/.DS_Store` makes tool resolution crash.

All glob patterns solve from this issue:

```dart
          if (Platform.isMacOS) ...[
            '\$HOME/Library/Android/sdk/ndk/*/',
          ],
```

They also return `.DS_Store` (even though there is a slash at the end.)