- Added UIKitTextInputService.runImeActionIfRequired that calls the
  current keyboard action if needed
- Added UIKitTextInputService.onKeyEvent that calls a keyboard
  action when required
- Prevented UIKitTextInputService.skikoInput from adding a new line
  character when singleLine = true or a keyboard action needs to be
  called
- Passed UIKitTextInputService::onKeyEvent to ComposeLayer.setContent
  from ComposeWindow

…single hardware key press

…gleLine is true on iOS

… keyboards