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### Issue Link: What is the link to the issue this cherry-pick is addressing? https://github.com/flutter/flutter/issues/168846 ### Changelog Description: Explain this cherry pick in one line that is accessible to most Flutter developers. See [best practices](https://github.com/flutter/flutter/blob/main/docs/releases/Hotfix-Documentation-Best-Practices.md) for examples This cherry pick fixes an issue where some users would see a question mark instead of the appropriate icon in the widget inspector button which toggles select-mode on/off. ### Impact Description: Users who don't have `cupertino_icons` as a dependency in their pubspec will see a question mark in one of the widget inspector buttons. <img width="169" alt="Screenshot 2025-05-19 at 12 50 15 PM" src="https://github.com/user-attachments/assets/40cd01c9-f8a6-407d-9d1b-303bc1516d62" /> ### Workaround: Is there a workaround for this issue? Yes, add `cupertino_icons` package to user's pubspec. ### Risk: What is the risk level of this cherry-pick? Low ### Test Coverage: Are you confident that your fix is well-tested by automated tests? This was tested manually, there are no screenshot tests for this. However, this is only a UI change and not a behavior change. ### Validation Steps: What are the steps to validate that this fix works? 1. Run an app that doesn't have `cupertino_icons` in its pubspec 2. Open Flutter DevTools > Inspector 3. Enable select widget mode 4. Should not see a ? on any of the buttons