Support UpdateGeometry for more geometry types in `visualization/rendering/Scene.h`

**Is your feature request related to a problem? Please describe.**

There are functions to `AddGeometry` other than `geometry::PointCloud` but there are no `UpdateGeometry` functions for these other types.
It can be seen here: https://github.com/intel-isl/Open3D/blob/master/cpp/open3d/visualization/rendering/Scene.h#L103
```
virtual bool AddGeometry(const std::string& object_name,
const geometry::Geometry3D& geometry,
const Material& material,
const std::string& downsampled_name = "",
size_t downsample_threshold = SIZE_MAX) = 0;
virtual bool AddGeometry(const std::string& object_name,
const t::geometry::PointCloud& point_cloud,
const Material& material,
const std::string& downsampled_name = "",
size_t downsample_threshold = SIZE_MAX) = 0;
virtual bool AddGeometry(const std::string& object_name,
const TriangleMeshModel& model) = 0;

virtual void UpdateGeometry(const std::string& object_name,
const t::geometry::PointCloud& point_cloud,
uint32_t update_flags) = 0;
```
This functionality is needed to change the scene actively.

**Describe the solution you'd like**
A clear and concise description of what you want to happen.

I'd like:
```
virtual void UpdateGeometry(const std::string& object_name,
const geometry::Geometry3D& geometry,
uint32_t update_flags) = 0;
virtual void UpdateGeometry(const std::string& object_name,
const TriangleMeshModel& model,
uint32_t update_flags) = 0;
```

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