Get enrollment animation from overlay

Bug: 111548033

Test: Able to get animation from overlay
Test: atest RunSettingsRoboTests

Change-Id: Ib02f484474b306ba8d61f9be541acb12dd1ecd90

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

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2018 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;
+import android.graphics.Canvas;
+import android.graphics.Rect;
+
+/**
+ * Feature provider for face authentication.
+ */
+public interface FaceFeatureProvider {
+
+    interface EnrollingAnimation {
+        void onEnrollmentHelp(int helpMsgId, CharSequence helpString);
+        void onEnrollmentError(int errMsgId, CharSequence errString);
+        void onEnrollmentProgressChange(int steps, int remaining);
+        void draw(Canvas canvas);
+        void update(long t, long dt);
+    }
+
+    interface Listener {
+        void onEnrolled();
+    }
+
+    EnrollingAnimation getEnrollingAnimation(Context context, Listener listener, Rect bounds,
+            int borderWidth);
+}