Fix FaceSetupSlice test cases failure.

package com.android.settings.homepage.contextualcards.slices;

import static com.google.common.truth.Truth.assertThat;

import static org.mockito.Mockito.mock;

import static org.mockito.Mockito.spy;

import static org.mockito.Mockito.when;

import static com.google.common.truth.Truth.assertThat;

import android.content.Context;

import android.content.pm.PackageManager;

import android.hardware.face.FaceManager;

import android.os.UserHandle;

import android.provider.Settings;

import androidx.slice.Slice;

import androidx.slice.SliceMetadata;

import androidx.slice.SliceProvider;

import androidx.slice.widget.SliceLiveData;

import com.android.settings.R;

import com.android.settings.Utils;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;

    public void getSlice_noFaceManager_shouldReturnNull() {

        when(mPackageManager.hasSystemFeature(PackageManager.FEATURE_FACE)).thenReturn(false);

        final FaceSetupSlice setupSlice = new FaceSetupSlice(mContext);

        final SliceMetadata metadata = SliceMetadata.from(mContext, setupSlice.getSlice());

        assertThat(setupSlice.getSlice()).isNull();

        assertThat(metadata.isErrorSlice()).isTrue();

    }

    @Test

                0);

        final FaceSetupSlice setupSlice = new FaceSetupSlice(mContext);

        assertThat(setupSlice.getSlice()).isNull();

        final SliceMetadata metadata = SliceMetadata.from(mContext, setupSlice.getSlice());

        assertThat(metadata.isErrorSlice()).isTrue();

    }

    @Test