[MaterialResources, MaterialAttributes] Remove LIBRARY_GROUP Restriction #1181
Description
similar to #949
Is your feature request related to a problem? Please describe.
Loading material things programmatically require the usage of these utility functions.
Describe the solution you'd like
Make these classes available on the public API.
Describe alternatives you've considered
Copy these into source and keep in track with the library.
Additional context
We also happily accept pull requests.