3/n: Add FaceDialogView and "confirmation" plumbing

This change adds plumbing from <Biometric>Service to SystemUI for requiring
user confirmation (or not). This change also fixes some layout bugs
that were hard to notice.

Bug: 111461540
Fixes: 113130114
Fixes: 116135579

Test: With confirmation, crypto operation does not work until token
      is added to Keystore
Test: Without confirmation, crypto operation works when biometric is
      authenticated
Test: BiometricPromptDemo works, UI elements are all correct
Test: Talkback messages are correct

Change-Id: I2c05577699a29c09777cae4db6c7334c1e6bc179
diff --git a/packages/SystemUI/src/com/android/systemui/biometrics/FaceDialogView.java b/packages/SystemUI/src/com/android/systemui/biometrics/FaceDialogView.java
new file mode 100644
index 0000000..feef3a6d
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/biometrics/FaceDialogView.java
@@ -0,0 +1,62 @@
+/*
+ * 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.systemui.biometrics;
+
+import android.content.Context;
+import android.graphics.drawable.Drawable;
+import android.widget.ImageView;
+
+import com.android.systemui.R;
+
+/**
+ * This class loads the view for the system-provided dialog. The view consists of:
+ * Application Icon, Title, Subtitle, Description, Fingerprint Icon, Error/Help message area,
+ * and positive/negative buttons.
+ */
+public class FaceDialogView extends BiometricDialogView {
+    public FaceDialogView(Context context,
+            DialogViewCallback callback) {
+        super(context, callback);
+    }
+
+    @Override
+    protected int getHintStringResourceId() {
+        return R.string.face_dialog_looking_for_face;
+    }
+
+    @Override
+    protected int getAuthenticatedAccessibilityResourceId() {
+        if (mRequireConfirmation) {
+            return com.android.internal.R.string.face_authenticated_confirmation_required;
+        } else {
+            return com.android.internal.R.string.face_authenticated_no_confirmation_required;
+        }
+    }
+
+    @Override
+    protected int getIconDescriptionResourceId() {
+        return R.string.accessibility_face_dialog_face_icon;
+    }
+
+    @Override
+    protected void updateIcon(int lastState, int newState) {
+        Drawable icon = mContext.getDrawable(R.drawable.face_dialog_icon);
+
+        final ImageView faceIcon = getLayout().findViewById(R.id.biometric_icon);
+        faceIcon.setImageDrawable(icon);
+    }
+}