Settings: Battery saver updates.

- Fewer trigger level options, new default of 0 (never)
 - Use new shared feature description text (in framework)
 - Remove "always on", add new top-level switch bar.

Depends on the framework changes in I3d1ded1eec9e63e7d97469486f6a320e1bebbccd

Bug:16214395
Change-Id: Ia01186cfeb19d00672f62cc84787584b4dcc1143

res/values/arrays.xml

@@ -1240,9 +1240,7 @@
     <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>
 
     <!-- Process stats memory use details: labels for memory states -->

res/values/strings.xml

@@ -3986,9 +3986,6 @@
     <!-- [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 always on option -->
-    <string name="battery_saver_always_on_title">Always on</string>
-
     <!-- [CHAR_LIMIT=40] Battery saver: Title for automatic entry option -->
     <string name="battery_saver_turn_on_automatically_title">Turn on automatically</string>
 
@@ -3998,9 +3995,6 @@
     <!-- [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 be disabled when your device is plugged in.</string>
-
     <!-- Process Stats strings -->
     <skip />