remove lockscreen widget checkbox when there's no lockscreen.

Bug: 11190345
Change-Id: I1b48e7a6a70226b103d8a6a27bd3374ff8349b3f
diff --git a/src/com/android/settings/SecuritySettings.java b/src/com/android/settings/SecuritySettings.java
index e002264..e4dcea1 100644
--- a/src/com/android/settings/SecuritySettings.java
+++ b/src/com/android/settings/SecuritySettings.java
@@ -245,7 +245,8 @@
         // Enable or disable keyguard widget checkbox based on DPM state
         mEnableKeyguardWidgets = (CheckBoxPreference) root.findPreference(KEY_ENABLE_WIDGETS);
         if (mEnableKeyguardWidgets != null) {
-            if (ActivityManager.isLowRamDeviceStatic()) {
+            if (ActivityManager.isLowRamDeviceStatic()
+                    || mLockPatternUtils.isLockScreenDisabled()) {
                 // Widgets take a lot of RAM, so disable them on low-memory devices
                 PreferenceGroup securityCategory
                         = (PreferenceGroup) root.findPreference(KEY_SECURITY_CATEGORY);