breaking: Removed all references of deprecated navigator.network

[breautek]

Platforms affected

all

Motivation and Context

Removes deprecated navigator.network access.

Description

Removes all references of navigator.network in tests, plugin.xml clobber, and source comments.
In addition, I removed the deprecation notice of this API in the README.md

Testing

ran npm test

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary