Android 8.1去除锁屏（MTK 平台）

项目需求，去除锁屏，直接上代码：
 

--- vendor/mediatek/proprietary/packages/apps/SettingsProvider/res/values/defaults.xml  (版本 48)
+++ vendor/mediatek/proprietary/packages/apps/SettingsProvider/res/values/defaults.xml  (工作副本)
@@ -81,7 +81,7 @@
     <string name="def_trusted_sound" translatable="false">/system/media/audio/ui/Trusted.ogg</string>
     <string name="def_wireless_charging_started_sound" translatable="false">/system/media/audio/ui/WirelessChargingStarted.ogg</string>
 
-    <bool name="def_lockscreen_disabled">false</bool>
+    <bool name="def_lockscreen_disabled">true</bool>
     <bool name="def_device_provisioned">false</bool>
     <integer name="def_dock_audio_media_enabled">1</integer>

--- vendor/mediatek/proprietary/packages/apps/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java   (版本 48)
+++ vendor/mediatek/proprietary/packages/apps/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java   (工作副本)
@@ -2429,7 +2429,7 @@
             loadBooleanSetting(stmt, Settings.Secure.ACCESSIBILITY_SPEAK_PASSWORD,
                     R.bool.def_accessibility_speak_password);
 
-            if (SystemProperties.getBoolean("ro.lockscreen.disable.default", false) == true) {
+            if (SystemProperties.getBoolean("ro.lockscreen.disable.default", true) == true) {
                 loadSetting(stmt, Settings.System.LOCKSCREEN_DISABLED, "1");
             } else {