AOD: Ambient display settings to dedicated settings screen

Bug: 33279975
Test: make RunSettingsRoboTests
Change-Id: I5f3ddf3b3abfc989907293b4a47b78568c01cf9b

src/com/android/settings/display/AmbientDisplayAlwaysOnPreferenceController.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2017 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.display;
+
+import static android.provider.Settings.Secure.DOZE_ALWAYS_ON;
+
+
+import android.content.Context;
+import android.os.UserHandle;
+import android.provider.Settings;
+import android.support.v14.preference.SwitchPreference;
+import android.support.v7.preference.Preference;
+
+import com.android.internal.hardware.AmbientDisplayConfiguration;
+import com.android.settings.core.PreferenceController;
+
+public class AmbientDisplayAlwaysOnPreferenceController extends PreferenceController
+        implements Preference.OnPreferenceChangeListener {
+
+    private static final String KEY_ALWAYS_ON = "ambient_display_always_on";
+    private static final int MY_USER = UserHandle.myUserId();
+
+    private final AmbientDisplayConfiguration mConfig;
+
+    public AmbientDisplayAlwaysOnPreferenceController(Context context,
+            AmbientDisplayConfiguration config) {
+        super(context);
+        mConfig = config;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_ALWAYS_ON;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        ((SwitchPreference) preference).setChecked(mConfig.alwaysOnEnabled(MY_USER));
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        int enabled = (boolean) newValue ? 1 : 0;
+        Settings.Secure.putInt(mContext.getContentResolver(), DOZE_ALWAYS_ON, enabled);
+        return true;
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return mConfig.alwaysOnAvailable();
+    }
+}