Remove unused listener

- Remove OnMainSwitchChangeListener and it's interface since the
   callback will duplicate with setCheck() method, cause the toggle on
   event come with twice while on and off, in futher to casue some
   duplicate work or error metrics logging

Bug: 218405966
Test: make SettingsRoboTests
Change-Id: If20ed6488d21443b9c623e8fe4de383a84ea673a

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

@@ -22,9 +22,7 @@ import android.net.Uri;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.PowerManager;
-import android.provider.Settings;
 import android.provider.SettingsSlicesContract;
-import android.widget.Switch;
 
 import androidx.preference.PreferenceScreen;
 
@@ -36,15 +34,13 @@ import com.android.settingslib.core.lifecycle.events.OnStart;
 import com.android.settingslib.core.lifecycle.events.OnStop;
 import com.android.settingslib.fuelgauge.BatterySaverUtils;
 import com.android.settingslib.widget.MainSwitchPreference;
-import com.android.settingslib.widget.OnMainSwitchChangeListener;
-
 
 /**
  * Controller to update the battery saver button
  */
 public class BatterySaverButtonPreferenceController extends
-        TogglePreferenceController implements OnMainSwitchChangeListener, LifecycleObserver,
-        OnStart, OnStop, BatterySaverReceiver.BatterySaverListener {
+        TogglePreferenceController implements LifecycleObserver, OnStart, OnStop,
+        BatterySaverReceiver.BatterySaverListener {
     private static final long SWITCH_ANIMATION_DURATION = 350L;
 
     private final BatterySaverReceiver mBatterySaverReceiver;
@@ -96,20 +92,9 @@ public class BatterySaverButtonPreferenceController extends
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
         mPreference = screen.findPreference(getPreferenceKey());
-        mPreference.addOnSwitchChangeListener(this);
         mPreference.updateStatus(isChecked());
     }
 
-    @Override
-    public void onSwitchChanged(Switch switchView, boolean isChecked) {
-        // Cancel preference's check state once it's first time launch
-        if (isChecked && (Settings.Secure.getInt(mContext.getContentResolver(),
-                Settings.Secure.LOW_POWER_WARNING_ACKNOWLEDGED, 0) == 0)) {
-            mPreference.setChecked(false);
-        }
-        setChecked(isChecked);
-    }
-
     @Override
     public boolean isChecked() {
         return mPowerManager.isPowerSaveMode();