Replace dynamic summary text for SettingPref

All SettingPrefs that have dynamic summaries are replaced
by placeholder text. Changes are for:
- Battery Saver "Turn on automatically"
- Notification "Dock speaker plays"
- Notification "Emergency tone"

Bug: 36101902
Test: make RunSettingsRoboTests
Change-Id: Ic2556055c155989015dbef6b507d3e3b45b779b5

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

@@ -99,7 +99,6 @@ public class BatterySaverSettings extends SettingsPreferenceFragment
             }
         };
         mTriggerPref.init(this);
-
         mPowerManager = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);
     }