Update FaceSlice to use correct pref & FaceManager

Fixes: 137137134
Test: Manual.
Change-Id: Idc707a7d2009975f81902867e4c37a8ee5775700
(cherry picked from commit 365beaebdbf07017219d5e6db17ba6a7be86c16c)
diff --git a/src/com/android/settings/biometrics/face/FaceProfileStatusPreferenceController.java b/src/com/android/settings/biometrics/face/FaceProfileStatusPreferenceController.java
index 5015fba..eeb2cbf 100644
--- a/src/com/android/settings/biometrics/face/FaceProfileStatusPreferenceController.java
+++ b/src/com/android/settings/biometrics/face/FaceProfileStatusPreferenceController.java
@@ -25,7 +25,7 @@
 
 public class FaceProfileStatusPreferenceController extends FaceStatusPreferenceController {
 
-    public static final String KEY_FACE_SETTINGS = "face_settings_profile";
+    private static final String KEY_FACE_SETTINGS = "face_settings_profile";
 
     public FaceProfileStatusPreferenceController(Context context) {
         super(context, KEY_FACE_SETTINGS);
diff --git a/src/com/android/settings/biometrics/face/FaceStatusPreferenceController.java b/src/com/android/settings/biometrics/face/FaceStatusPreferenceController.java
index 8450577..cb82b5e 100644
--- a/src/com/android/settings/biometrics/face/FaceStatusPreferenceController.java
+++ b/src/com/android/settings/biometrics/face/FaceStatusPreferenceController.java
@@ -26,7 +26,7 @@
 
 public class FaceStatusPreferenceController extends BiometricStatusPreferenceController {
 
-    private static final String KEY_FACE_SETTINGS = "face_settings";
+    public static final String KEY_FACE_SETTINGS = "face_settings";
 
     protected final FaceManager mFaceManager;
 
diff --git a/src/com/android/settings/homepage/contextualcards/slices/FaceSetupSlice.java b/src/com/android/settings/homepage/contextualcards/slices/FaceSetupSlice.java
index 128d76b..3153950 100644
--- a/src/com/android/settings/homepage/contextualcards/slices/FaceSetupSlice.java
+++ b/src/com/android/settings/homepage/contextualcards/slices/FaceSetupSlice.java
@@ -25,7 +25,9 @@
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.hardware.biometrics.BiometricManager;
+import android.hardware.face.FaceManager;
 import android.net.Uri;
+import android.os.UserHandle;
 
 import androidx.core.graphics.drawable.IconCompat;
 import androidx.slice.Slice;
@@ -36,7 +38,7 @@
 import com.android.settings.R;
 import com.android.settings.SubSettings;
 import com.android.settings.Utils;
-import com.android.settings.biometrics.face.FaceProfileStatusPreferenceController;
+import com.android.settings.biometrics.face.FaceStatusPreferenceController;
 import com.android.settings.security.SecuritySettings;
 import com.android.settings.slices.CustomSliceRegistry;
 import com.android.settings.slices.CustomSliceable;
@@ -52,13 +54,8 @@
 
     @Override
     public Slice getSlice() {
-        final BiometricManager biometricManager = mContext.getSystemService(BiometricManager.class);
-        final PackageManager packageManager = mContext.getPackageManager();
-        if (!packageManager.hasSystemFeature(PackageManager.FEATURE_FACE)) {
-            // no face hardware
-            return null;
-        } else if (biometricManager.canAuthenticate() == BIOMETRIC_SUCCESS) {
-            // face hardware, and already enrolled
+        final FaceManager faceManager = mContext.getSystemService(FaceManager.class);
+        if (faceManager == null || faceManager.hasEnrolledTemplates(UserHandle.myUserId())) {
             return null;
         }
 
@@ -84,7 +81,7 @@
     public Intent getIntent() {
         return SliceBuilderUtils.buildSearchResultPageIntent(mContext,
                 SecuritySettings.class.getName(),
-                FaceProfileStatusPreferenceController.KEY_FACE_SETTINGS,
+                FaceStatusPreferenceController.KEY_FACE_SETTINGS,
                 mContext.getText(R.string.security_settings_face_settings_enroll).toString(),
                 SettingsEnums.SLICE)
                 .setClassName(mContext.getPackageName(), SubSettings.class.getName());
diff --git a/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/FaceSetupSliceTest.java b/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/FaceSetupSliceTest.java
index f6c1821..5e364c0 100644
--- a/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/FaceSetupSliceTest.java
+++ b/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/FaceSetupSliceTest.java
@@ -16,19 +16,15 @@
 
 package com.android.settings.homepage.contextualcards.slices;
 
-import static android.hardware.biometrics.BiometricConstants.BIOMETRIC_ERROR_NO_BIOMETRICS;
-import static android.hardware.biometrics.BiometricManager.BIOMETRIC_SUCCESS;
-
-import static org.mockito.Mockito.doReturn;
+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.biometrics.BiometricConstants;
-import android.hardware.biometrics.BiometricManager;
+import android.hardware.face.FaceManager;
+import android.os.UserHandle;
 
 import androidx.slice.Slice;
 import androidx.slice.SliceProvider;
@@ -46,43 +42,36 @@
 @RunWith(RobolectricTestRunner.class)
 public class FaceSetupSliceTest {
 
-    private BiometricManager mBiometricManager;
     private Context mContext;
-    private PackageManager mPackageManager;
 
     @Before
     public void setUp() {
         // Set-up specs for SliceMetadata.
         SliceProvider.setSpecs(SliceLiveData.SUPPORTED_SPECS);
         mContext = spy(RuntimeEnvironment.application);
-        mPackageManager = spy(mContext.getPackageManager());
-        mBiometricManager = spy(mContext.getSystemService(BiometricManager.class));
     }
 
     @Test
-    public void getSlice_noFaceSupported_shouldReturnNull() {
-        when(mPackageManager.hasSystemFeature(PackageManager.FEATURE_FACE)).thenReturn(false);
-        when(mContext.getPackageManager()).thenReturn(mPackageManager);
+    public void getSlice_noFaceManager_shouldReturnNull() {
+        when(mContext.getSystemService(FaceManager.class)).thenReturn(null);
         final FaceSetupSlice setupSlice = new FaceSetupSlice(mContext);
         assertThat(setupSlice.getSlice()).isNull();
     }
 
     @Test
-    public void getSlice_faceSupportedUserEnrolled_shouldReturnNull() {
-        when(mBiometricManager.canAuthenticate()).thenReturn(BIOMETRIC_SUCCESS);
-        when(mPackageManager.hasSystemFeature(PackageManager.FEATURE_FACE)).thenReturn(true);
-        when(mContext.getPackageManager()).thenReturn(mPackageManager);
-        when(mContext.getSystemService(BiometricManager.class)).thenReturn(mBiometricManager);
+    public void getSlice_faceEnrolled_shouldReturnNull() {
+        final FaceManager faceManager = mock(FaceManager.class);
+        when(mContext.getSystemService(FaceManager.class)).thenReturn(faceManager);
+        when(faceManager.hasEnrolledTemplates(UserHandle.myUserId())).thenReturn(true);
         final FaceSetupSlice setupSlice = new FaceSetupSlice(mContext);
         assertThat(setupSlice.getSlice()).isNull();
     }
 
     @Test
-    public void getSlice_faceSupportedUserNotEnrolled_shouldReturnNonNull() {
-        when(mBiometricManager.canAuthenticate()).thenReturn(BIOMETRIC_ERROR_NO_BIOMETRICS);
-        when(mPackageManager.hasSystemFeature(PackageManager.FEATURE_FACE)).thenReturn(true);
-        when(mContext.getPackageManager()).thenReturn(mPackageManager);
-        when(mContext.getSystemService(BiometricManager.class)).thenReturn(mBiometricManager);
+    public void getSlice_faceNotEnrolled_shouldReturnNonNull() {
+        final FaceManager faceManager = mock(FaceManager.class);
+        when(mContext.getSystemService(FaceManager.class)).thenReturn(faceManager);
+        when(faceManager.hasEnrolledTemplates(UserHandle.myUserId())).thenReturn(false);
         final FaceSetupSlice setupSlice = new FaceSetupSlice(mContext);
         assertThat(setupSlice.getSlice()).isNotNull();
     }