Combined biometric settings implementation

There will be multiple biometrics authentications existing at the same
time, so we added a new page for multiple biometrics to control
biometrics settings.

Bug: 183449119
Test: manual test
Change-Id: I359082caf771e07dfd5b24973cb8a3cf372c1b30

src/com/android/settings/biometrics/face/FaceSettingsLockscreenBypassPreferenceController.java

@@ -26,6 +26,7 @@ import android.provider.Settings;
 import androidx.preference.Preference;
 
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.settings.Utils;
 import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
 import com.android.settingslib.RestrictedSwitchPreference;
 
@@ -82,6 +83,11 @@ public class FaceSettingsLockscreenBypassPreferenceController
 
     @Override
     public int getAvailabilityStatus() {
+        // When the device supports multiple biometrics auth, this preference will be shown
+        // in face unlock category.
+        if (Utils.isMultipleBiometricsSupported(mContext)) {
+            return AVAILABLE;
+        }
         if (mUserManager.isManagedProfile(UserHandle.myUserId())) {
             return UNSUPPORTED_ON_DEVICE;
         }