Worked on the flutter/flutter repository to modernize Android platform support by removing compatibility for API levels 21 and 22, effectively dropping Lollipop support and raising the minimum SDK to 23. This update streamlined the codebase by eliminating deprecated tests and code paths, reducing technical debt and simplifying future maintenance. The changes were implemented using Java and focused on Android development best practices, with attention to unit testing to ensure stability. By aligning the project with newer Android features and behaviors, the work improved long-term compatibility and set a clearer foundation for ongoing integration with the evolving Android ecosystem.