Add option to disable lockscreen by default

Bug: 27502832
Change-Id: I3e5d024c07a69f3fea1c0450040898c53b732183

core/java/com/android/internal/widget/LockPatternUtils.java

@@ -589,8 +589,14 @@ public class LockPatternUtils {
      * @return true if lock screen is disabled
      */
     public boolean isLockScreenDisabled(int userId) {
-        return !isSecure(userId) &&
-                getBoolean(DISABLE_LOCKSCREEN_KEY, false, userId);
+        if (isSecure(userId)) {
+            return false;
+        }
+        boolean disabledByDefault = mContext.getResources().getBoolean(
+                com.android.internal.R.bool.config_disableLockscreenByDefault);
+        boolean isSystemUser = UserManager.isSplitSystemUser() && userId == UserHandle.USER_SYSTEM;
+        return getBoolean(DISABLE_LOCKSCREEN_KEY, false, userId)
+                || (disabledByDefault && !isSystemUser);
     }
 
     /**

core/res/res/values/config.xml

@@ -967,6 +967,9 @@
          If so, this should be set to 'false' in an overlay. -->
     <bool name="config_enable_emergency_call_while_sim_locked">true</bool>
 
+    <!-- Is the lock-screen disabled for new users by default -->
+    <bool name="config_disableLockscreenByDefault">false</bool>
+
     <!-- Control the behavior when the user long presses the home button.
             0 - Nothing
             1 - Recent apps view in SystemUI

core/res/res/values/symbols.xml

@@ -249,6 +249,7 @@
   <java-symbol type="bool" name="config_autoPowerModePrefetchLocation" />
   <java-symbol type="bool" name="config_enable_emergency_call_while_sim_locked" />
   <java-symbol type="bool" name="config_enable_puk_unlock_screen" />
+  <java-symbol type="bool" name="config_disableLockscreenByDefault" />
   <java-symbol type="bool" name="config_enableBurnInProtection" />
   <java-symbol type="bool" name="config_hotswapCapable" />
   <java-symbol type="bool" name="config_mms_content_disposition_support" />