Settings: Battery saver settings sub-page.

New battery saver settings page, accessed via
the power usage settings overflow menu.

The settings page has a master switch to toggle
battery saver mode, feature disclosure text,
and a preference to configure the automatic
trigger level.

Remove developer checkbox now that this option
has a real home.

NO_SQ: multi project change
Bug:13329308
Change-Id: Iac54238f3406439711b44a3c17f220ac5e370a37

res/values/arrays.xml

@@ -1218,4 +1218,13 @@
         <item>1</item>
         <item>2</item>
     </string-array>
+
+    <!-- Battery saver mode: allowable trigger threshold levels. -->
+    <integer-array name="battery_saver_trigger_values" translatable="false" >
+        <item>0</item>
+        <item>5</item>
+        <item>10</item>
+        <item>15</item>
+        <item>20</item>
+    </integer-array>
 </resources>

res/values/strings.xml

@@ -3732,6 +3732,21 @@
     <!-- Label for mediaserver process -->
     <string name="process_mediaserver_label">Mediaserver</string>
 
+    <!-- [CHAR_LIMIT=40] Battery saver: Label for feature, title + menu item -->
+    <string name="battery_saver">Battery saver</string>
+
+    <!-- [CHAR_LIMIT=40] Battery saver: Title for automatic entry option -->
+    <string name="battery_saver_turn_on_automatically_title">Turn on automatically</string>
+
+    <!-- [CHAR_LIMIT=40] Battery saver: Value for automatic entry option: Never -->
+    <string name="battery_saver_turn_on_automatically_never">Never</string>
+
+    <!-- [CHAR_LIMIT=40] Battery saver: Value for automatic entry option: pct% battery -->
+    <string name="battery_saver_turn_on_automatically_pct">at %1$d%% battery</string>
+
+    <!-- [CHAR_LIMIT=NONE] Battery saver: Feature description -->
+    <string name="battery_saver_description">To help improve battery life, Battery saver will reduce your device’s performance.\n\nBattery saver will turn off when your device is plugged in.</string>
+
     <!-- Process Stats strings -->
     <skip />