Add activities to support voice settings.

Adds Voice Interaction Activities for:
- Do not disturb mode (with interaction)
- Battery Saver mode
- Airplane mode

Change-Id: I4480dc3a30975d94b71714ff58fbeebddfbc1c58

src/com/android/settings/fuelgauge/BatterySaverModeVoiceActivity.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2015 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.fuelguage;
+
+import static android.provider.Settings.EXTRA_BATTERY_SAVER_MODE_ENABLED;
+
+import android.content.Context;
+import android.content.Intent;
+import android.os.PowerManager;
+import android.provider.Settings;
+import android.util.Log;
+
+import com.android.settings.utils.VoiceSettingsActivity;
+
+/**
+ * Activity for modifying the {@link android.os.PowerManager} power save mode
+ * setting using the Voice Interaction API.
+ */
+public class BatterySaverModeVoiceActivity extends VoiceSettingsActivity {
+    private static final String TAG = "BatterySaverModeVoiceActivity";
+
+    protected boolean onVoiceSettingInteraction(Intent intent) {
+        if (intent.hasExtra(EXTRA_BATTERY_SAVER_MODE_ENABLED)) {
+            PowerManager powerManager = (PowerManager) getSystemService(Context.POWER_SERVICE);
+            if (powerManager.setPowerSaveMode(
+                    intent.getBooleanExtra(EXTRA_BATTERY_SAVER_MODE_ENABLED, false))) {
+                notifySuccess(null);
+            } else {
+                Log.v(TAG, "Unable to set power mode");
+                notifyFailure(null);
+            }
+        } else {
+            Log.v(TAG, "Missing battery saver mode extra");
+        }
+        return true;
+    }
+}