Settings UI fix for missing secure lock screen feature.

Bug: 123737250
Bug: 111072170
Bug: 111071972
Test: manual both with and without the feature flag
Test: make RunSettingsRoboTests

Change-Id: Iacefa95dce85d860633315e074cbf2772691cfdd

tests/robotests/src/com/android/settings/testutils/shadow/ShadowLockPatternUtils.java

@@ -31,6 +31,11 @@ public class ShadowLockPatternUtils {
 
     private static boolean sDeviceEncryptionEnabled;
 
+    @Implementation
+    protected boolean hasSecureLockScreen() {
+        return true;
+    }
+
     @Implementation
     protected boolean isSecure(int id) {
         return true;