android 6.0.1 充电提示音

6.0的充电提示音现在看来是无线充电的充电提示音，插入电源或usb进行充电，目前代码中并未有相关插入充电提示音的代码

移除无线充电提示音设置项，以免误认为是插入充电的提示音

OtherSoundSettings.java

字符串：charging_sounds_title
字符串引用：
packages/apps/Settings/res/xml/other_sound_settings.xml
java文件引用：
packages/apps/Settings/src/com/android/settings/notification/OtherSoundSettings.java CHARGING_SOUNDS_ENABLED
frameworks/base/services/core/java/com/android/server/power/Notifier.java:                Settings.Global.CHARGING_SOUNDS_ENABLED, 1) != 0;
private void playWirelessChargingStartedSound() {
        final boolean enabled = Settings.Global.getInt(mContext.getContentResolver(),
                Settings.Global.CHARGING_SOUNDS_ENABLED, 1) != 0;
        final String soundPath = Settings.Global.getString(mContext.getContentResolver(),
              &nb