test: Adjust tests namespaces to match folder structure

[Dor-bl]

Fix namespaces to match folder
Fix ContactsActivity name

List of changes

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Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change that adds functionality or value)
• Breaking change (fix or feature that would cause existing functionality not to work as expected)
• Test fix (non-breaking change that improves test stability or correctness)

Documentation

• Have you proposed a file change/ PR with Appium to update documentation?

This can be done by navigating to the documentation section on http://appium.io selecting the appropriate command/endpoint and clicking the 'Edit this doc' link to update the C# example

Integration tests

• [] Have you provided integration tests for your changes? (required for Bugfix, New feature, or Test fix)

Details

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