Merge "Post UI update later a while to avoid screen sluggish as possible" into sc-v2-dev

import android.content.ContentResolver;

import android.content.Context;

import android.net.Uri;

import android.os.Handler;

import android.os.Looper;

import android.os.PowerManager;

import android.provider.SettingsSlicesContract;

import android.widget.Switch;

public class BatterySaverButtonPreferenceController extends

        TogglePreferenceController implements OnMainSwitchChangeListener, LifecycleObserver,

        OnStart, OnStop, BatterySaverReceiver.BatterySaverListener {

    private static final long SWITCH_ANIMATION_DURATION = 350L;

    private final BatterySaverReceiver mBatterySaverReceiver;

    private final PowerManager mPowerManager;

    private Handler mHandler;

    private MainSwitchPreference mPreference;

    public BatterySaverButtonPreferenceController(Context context, String key) {

        mPowerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);

        mBatterySaverReceiver = new BatterySaverReceiver(context);

        mBatterySaverReceiver.setBatterySaverListener(this);

        mHandler = new Handler(Looper.getMainLooper());

    }

    @Override

    @Override

    public void onStop() {

        mBatterySaverReceiver.setListening(false);

        mHandler.removeCallbacksAndMessages(null /* token */);

    }

    @Override

    @Override

    public void onPowerSaveModeChanged() {

        mHandler.postDelayed(() -> onPowerSaveModeChangedInternal(),

                SWITCH_ANIMATION_DURATION);

    }

    private void onPowerSaveModeChangedInternal() {

        final boolean isChecked = isChecked();

        if (mPreference != null && mPreference.isChecked() != isChecked) {

            mPreference.setChecked(isChecked);