fixed piwik tracker js in matomo.js: JS tracker should not track anything when the protocol is file:// to avoid tracking personal data by accident #19507

Description:

Please include a description of this change and which issue it fixes. If no issue exists yet please include context and what problem it solves.

Review

• [ ] Functional review done
• [ ] Potential edge cases thought about (behavior of the code with strange input, with strange internal state or possible interactions with other Matomo subsystems)
• [ ] Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• [ ] Security review done
• [ ] Wording review done
• [ ] Code review done
• [ ] Tests were added if useful/possible
• [ ] Reviewed for breaking changes
• [ ] Developer changelog updated if needed
• [ ] Documentation added if needed
• [ ] Existing documentation updated if needed

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