HarmonyOS 如何在代码里面最小化App（回到桌面）

参考示例如下：

async function minimizeClick() {
  let windowClass = await window.getLastWindow(getContext());
  windowClass.minimize((err: BusinessError) => {
    const errCode: number = err.code;
    if (errCode) {
      console.error(`Failed to minimize the window. Cause code: ${err.code}, message: ${err.message}`);
      return;
    }
    console.info('Succeeded in minimizing the window.');
  });
}