Battery saver: new policy changes + SystemUI tweaks.

 - Service policy changes: allow the user to turn off (snooze)
   saver mode below the auto-trigger level.  Plugging in the
   device always exits saver mode.
 - Default trigger level is now 0 (never) instead of 15.
 - SystemUI now also listens to a new POWER_SAVE_MODE_CHANGING,
   since waiting for _CHANGED can take seconds.
 - Move shared feature description text into the framework so it
   can be shared.
 - Tweak dialog title + action strings.
 - Remove trigger-level from SystemUI, it no longer needs it.
 - Add the ability to turn off saver mode directly from the
   notification.
 - Migrate saver confirmation dialog to common system UI dialog
   helper, and add a few convenience methods.
 - Fix bug where the status bar area would be orange over the keyguard
   in SHADE_LOCKED mode.

Bug:16214395
Change-Id: I3d1ded1eec9e63e7d97469486f6a320e1bebbccd
diff --git a/packages/SystemUI/res/values/strings.xml b/packages/SystemUI/res/values/strings.xml
index 085d2f9..296cdad 100644
--- a/packages/SystemUI/res/values/strings.xml
+++ b/packages/SystemUI/res/values/strings.xml
@@ -86,16 +86,13 @@
     <string name="battery_low_why">Settings</string>
 
     <!-- Battery saver confirmation dialog title [CHAR LIMIT=NONE]-->
-    <string name="battery_saver_confirmation_title">Start battery saver?</string>
+    <string name="battery_saver_confirmation_title">Turn on battery saver?</string>
 
     <!-- Battery saver confirmation dialog ok text [CHAR LIMIT=40]-->
-    <string name="battery_saver_confirmation_ok">Start</string>
+    <string name="battery_saver_confirmation_ok">Turn on</string>
 
     <!-- Battery saver notification action [CHAR LIMIT=NONE]-->
-    <string name="battery_saver_start_action">Start battery saver</string>
-
-    <!-- Battery saver confirmation dialog text [CHAR LIMIT=NONE]-->
-    <string name="battery_saver_confirmation_text">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>
+    <string name="battery_saver_start_action">Turn on battery saver</string>
 
     <!-- Name of the button that links to the Settings app. [CHAR LIMIT=NONE] -->
     <string name="status_bar_settings_settings_button">Settings</string>
@@ -719,10 +716,10 @@
     <string name="battery_saver_notification_title">Battery saver is on</string>
 
     <!-- Battery saver notification text. [CHAR LIMIT=60] -->
-    <string name="battery_saver_notification_text">Device performance is reduced.</string>
+    <string name="battery_saver_notification_text">Reduces performance and background data</string>
 
     <!-- Battery saver notification action text. [CHAR LIMIT=60] -->
-    <string name="battery_saver_notification_action_text">Open battery saver settings</string>
+    <string name="battery_saver_notification_action_text">Turn off battery saver</string>
 
     <!-- Battery level for expanded quick settings [CHAR LIMIT=2] -->
     <string name="battery_level_template"><xliff:g id="level" example="45">%d</xliff:g>%%</string>