Make battery seekbar update continuous

After this cl, when user slides the slider, the text will be
updated continuously.

Bug: 73763634
Test: Manual
Change-Id: Ief9278d39426f6ec9ce9bbcc0be911d083673684

src/com/android/settings/fuelgauge/batterysaver/AutoBatterySeekBarPreferenceController.java

@@ -61,6 +61,7 @@ public class AutoBatterySeekBarPreferenceController extends BasePreferenceContro
         super.displayPreference(screen);
         mPreference = (SeekBarPreference) screen.findPreference(
                 KEY_AUTO_BATTERY_SEEK_BAR);
+        mPreference.setContinuousUpdates(true);
         updatePreference(mPreference);
     }