Description

Fixes the text scale factor to 1.0 for navigationBar(sliver and non sliver) and tabBar.

Related Issues

Fixes #35199

Tests

I added the following tests:

• textScaleFactor is set to 1.0

Checklist

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• I read the Contributor Guide and followed the process outlined there for submitting PRs.
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• I read and followed the Flutter Style Guide, including Features we expect every widget to implement.
• I updated/added relevant documentation (doc comments with ///).
• All existing and new tests are passing.
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Breaking Change

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• No, this is not a breaking change.