When simplify_quadric_decimation is used, the UVs and maps of OBJ are missing. What should I do with this?

### Checklist

- [X] I have searched for [similar issues](https://github.com/isl-org/Open3D/issues).
- [X] For Python issues, I have tested with the [latest development wheel](http://www.open3d.org/docs/latest/getting_started.html#development-version-pip).
- [X] I have checked the [release documentation](http://www.open3d.org/docs/release/) and the [latest documentation](http://www.open3d.org/docs/latest/) (for `master` branch).

### My Question

When simplify_quadric_decimation is used, OBJ's UVs and maps disappear
And there is a warning[Open3D WARNING] [SimplifyQuadricDecimation] This mesh contains triangle uvs that are not handled in this function
How can I solve this problem？