Replace internal material/web usages

[silamon]

Proposed change

This was in the changelog of material/web package during the prereleases:
"Rename @material/web//lib to @material/web//internal. Prefer not using internal files."
There were already some imports at the time, and they were replaced with internal import back then.
I think it can be avoided using the changes in this PR, and allows us to stick closer to their public API.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (thank you!)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example configuration

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue or discussion:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io