iPhone-Style UI Upgrade for OpenCamera

I am seeking an experienced Android developer to enhance one of the open-source-based (Open Camera) camera app by adding a new UI layout inspired by the iPhone camera interface. The task involves creating a mode selector, implementing gesture-based mode switching, and developing a collapsible advanced settings panel. The new layout should integrate seamlessly with existing UI versions and maintain smooth performance without disrupting current features.

The current design will be attached as a screenshot.

Deliverables:
1. Develop iPhone-style mode selector
2. Implement gesture-based mode switching
3. Ensure smooth integration with existing UI