LEDs Brightness: Update the slider for M

<!-- Copyright (C) 2014 The Android Open Source Project

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     Copyright (C) 2015 The Android Open Source Project

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<vector xmlns:android="http://schemas.android.com/apk/res/android"

        android:width="24dp"

android:height="24dp" android:viewportWidth="24.0"

        android:height="24dp"

        android:viewportWidth="24.0"

        android:viewportHeight="24.0">

    <path

        android:pathData="M19.4,13.0c0.0,-0.3 0.1,-0.6 0.1,-1.0s0.0,-0.7 -0.1,-1.0l2.1,-1.7c0.2,-0.2 0.2,-0.4 0.1,-0.6l-2.0,-3.5C19.5,5.1 19.3,5.0 19.0,5.1l-2.5,1.0c-0.5,-0.4 -1.1,-0.7 -1.7,-1.0l-0.4,-2.6C14.5,2.2 14.2,2.0 14.0,2.0l-4.0,0.0C9.8,2.0 9.5,2.2 9.5,2.4L9.1,5.1C8.5,5.3 8.0,5.7 7.4,6.1L5.0,5.1C4.7,5.0 4.5,5.1 4.3,5.3l-2.0,3.5C2.2,8.9 2.3,9.2 2.5,9.4L4.6,11.0c0.0,0.3 -0.1,0.6 -0.1,1.0s0.0,0.7 0.1,1.0l-2.1,1.7c-0.2,0.2 -0.2,0.4 -0.1,0.6l2.0,3.5C4.5,18.9 4.7,19.0 5.0,18.9l2.5,-1.0c0.5,0.4 1.1,0.7 1.7,1.0l0.4,2.6c0.0,0.2 0.2,0.4 0.5,0.4l4.0,0.0c0.2,0.0 0.5,-0.2 0.5,-0.4l0.4,-2.6c0.6,-0.3 1.2,-0.6 1.7,-1.0l2.5,1.0c0.2,0.1 0.5,0.0 0.6,-0.2l2.0,-3.5c0.1,-0.2 0.1,-0.5 -0.1,-0.6L19.4,13.0zM12.0,15.5c-1.9,0.0 -3.5,-1.6 -3.5,-3.5s1.6,-3.5 3.5,-3.5s3.5,1.6 3.5,3.5S13.9,15.5 12.0,15.5z"

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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

        xmlns:systemui="http://schemas.android.com/apk/res/com.android.systemui"

    android:paddingStart="16dp"

    android:paddingEnd="16dp"

    xmlns:systemui="http://schemas.android.com/apk/res-auto"

    android:paddingLeft="16dp"

    android:paddingRight="16dp"

    style="@style/BrightnessDialogContainer">

    <com.android.systemui.settings.ToggleSlider

        android:layout_height="wrap_content"

        android:layout_gravity="center_vertical"

        android:layout_weight="1"

        systemui:text="" />

        systemui:text=""

        android:contentDescription="@string/accessibility_notification_brightness"

        android:importantForAccessibility="no" />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>

<!--

/**

 * Copyright (c) 2009, The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License"); 

 * you may not use this file except in compliance with the License. 

 * You may obtain a copy of the License at 

 *

 *     http://www.apache.org/licenses/LICENSE-2.0 

 *

 * Unless required by applicable law or agreed to in writing, software 

 * distributed under the License is distributed on an "AS IS" BASIS, 

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 

 * See the License for the specific language governing permissions and 

 * limitations under the License.

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-->

<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">

    <!-- Content description of the light brightness slider (not shown on the screen). [CHAR LIMIT=NONE] -->

    <string name="accessibility_notification_brightness">Light brightness</string>

    <!-- Lights settings, LED notification -->

    <string name="led_notification_title">Light settings</string>

    <string name="led_notification_text">LED light enabled by settings</string>

</resources>

import android.os.AsyncTask;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.os.UserHandle;

import android.provider.Settings;

import com.android.systemui.R;

import java.lang.Exception;

import java.util.ArrayList;

    public static final int LIGHT_BRIGHTNESS_MINIMUM = 1;

    public static final int LIGHT_BRIGHTNESS_MAXIMUM = 255;

    // Minimum delay between LED notification updates

    private final static long LED_UPDATE_DELAY_MS = 250;

    private int mCurrentBrightness;

    private final int mMinimumBrightness;

    private final int mMaximumBrightness;

        mNotificationBuilder = new Notification.Builder(mContext);

        mNotificationBundle.putBoolean(Notification.EXTRA_FORCE_SHOW_LIGHTS, true);

        mNotificationBuilder.setExtras(mNotificationBundle);

        mNotificationBuilder.setExtras(mNotificationBundle)

                .setContentTitle(mContext.getString(R.string.led_notification_title))

                .setContentText(mContext.getString(R.string.led_notification_text))

                .setSmallIcon(R.drawable.ic_settings)

                .setOngoing(true);

    }

    private Handler mLedHandler = new Handler() {

        public void handleMessage(Message msg) {

            updateNotification();

        }

    };

    public void addStateChangedCallback(BrightnessStateChangeCallback cb) {

        mChangeCallbacks.add(cb);

    /** Fetch the brightness from the system settings and update the slider */

    private void updateNotification() {

        // Dampen rate of consecutive LED changes

        if (mLedHandler.hasMessages(0)) {

            return;

        }

        if (mNotificationAllow) {

            mLedHandler.sendEmptyMessageDelayed(0, LED_UPDATE_DELAY_MS);

            // Instead of canceling the notification, force it to update with the color.

            // Use a white light for a better preview of the brightness.

            int notificationColor = 0xFFFFFF | (mCurrentBrightness << 24);

package com.android.systemui.settings;

import android.app.Activity;

import android.app.Dialog;

import android.content.Context;

import android.content.res.Resources;

import android.os.Bundle;

import android.os.Handler;

import android.view.Gravity;

import android.view.KeyEvent;

import android.view.Window;