Fix stallDurations metadata buffer, add web=true, rebuild provider

- Increase camera metadata buffer from 2048 to 4096 bytes to prevent
  silent truncation of stallDurations (required by Android 16)
- Add web=true to module.prop for KernelSU WebUI detection
- Rebuilt virtual_camera_provider with buffer fix
- Updated WebUI JS with improved status display
- Bump version to 3.1

webui/index.html

@@ -29,6 +29,7 @@
 <div class="grid">
 <button id="btn-start" class="btn">Start Provider</button>
 <button id="btn-stop" class="btn danger">Stop</button>
+<button id="btn-restart" class="btn warning">Restart</button>
 <button id="btn-feed" class="btn">Start Feeder</button>
 <button id="btn-unfeed" class="btn danger">Stop Feeder</button>
 <button id="btn-refresh" class="btn">Refresh</button>