Enhance Android APK With Manual Focus

I need to add a manual focus feature to my existing Android APK. The feature should work in both the Calibration and Record tabs. When the camera preview becomes blurred, the user should have an option to manually trigger autofocus by interacting with the camera preview/screen. The focus should be adjusted without removing or reinserting the strip. The existing autofocus functionality should remain unchanged. Please provide the updated APK and complete source code after implementation.