[移动开发]android 7/9 设置默认永不休眠和添加永不休眠选项及禁止锁屏

device/qcom/msmxxx/overlay/frameworks/base/packages/SettingsProvider/res/values/defaults.xml
<resources>
    <integer name="def_screen_off_timeout">2147483647</integer> //最大休眠时间
    <bool name="def_lockscreen_disabled">true</bool> //禁止锁屏
</resources>

device/qcom/msmxxx/overlay/packages/apps/Settings/res/values/arrays.xml

<!-- Display settings.  The delay in inactivity before the screen is turned off. These are shown in a list dialog. -->
    <string-array name="screen_timeout_entries">
       + <item>never</item>
        <item>15 seconds</item>
        <item>30 

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