start method
Starts the session as request asks. Throws an
UnsupportedCapabilityException naming the first capability of
request.required (or its mode) the runtime does not have — see
requireCapabilities.
Implementation
@override
Future<void> start(XrSessionRequest request) async {
requireCapabilities(request);
_request = request;
moveTo(XrSessionState.ready);
moveTo(XrSessionState.focused);
}