fix JNI wrapper for IValue interface change (#26448)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/26448
Seems CI was broken by PR #25439 - fix based on interface change.
Test Plan: - build locally
Differential Revision: D17468987
Pulled By: ljk53
fbshipit-source-id: 3c1cb582c8d05357a94295b670b2ce61a7a5a4cd
