starling-client/starling ? reverse-engineered prompt

Build me a polished Android app for playing Horizon on phone, now called Starling. I want it to feel like a real native Minecraft client on Android 9 and up, with Vulkan rendering, smooth performance, and a built in launcher so I can download resources, sign in, and start the game without extra setup.

Please include the touch controls from the project, joystick or D pad style with tap or crosshair aiming, and make the buttons editable so I can move them around, resize them, and change transparency. Add support for Android keyboard, clipboard, vibration, and basic settings like sprint and handedness.

It should also support sandboxed native .hmod mods and resource pack import. Keep the experience focused on actually getting into the game and playing, with a clean mobile friendly UI. If you need current Android or Vulkan docs, look them up online.