Returning null from onCreateInputConnection() prevented the Chromium
renderer from relaying hardware key events into HTML inputs, breaking
scanner input on the Urovo CT58C. Return the real InputConnection from
super and rely on the multi-layer keyboard suppression (JS inputmode,
InputMethodManager, EditorInfo flags, manifest flags) which is already
proven to work on this device.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
