Add feature provider for face unlock

Bug: 146085546

Test: Builds
Change-Id: If5c7d57c12a3f679d81cee22fb94a53fce1de29a

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

@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.settings.biometrics.face;
+
+import android.content.Context;
+
+/** Feature provider for face unlock */
+public interface FaceFeatureProvider {
+    /** Returns true if attention checking is supported. */
+    boolean isAttentionSupported(Context context);
+}