notifyUserNavigation method
Signals that the user manually interacted with the reader (a swipe or edge-tap page navigation). The native side enters narration "manual mode" if narration is currently driving the reader; otherwise it is a no-op.
Implementation
Future<void> notifyUserNavigation() {
_log.d(name);
return _invokeMethod(_ReaderChannelMethodInvoke.notifyUserNavigation);
}