Removing dependence on enable_facelock

With this change, FaceUnlock is enabled by default when installed
fixes 5989485

Change-Id: Icbce3237ff533e8b7b88faf592ac4a1e143d5dc3

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

@@ -857,11 +857,6 @@ public class LockPatternUtils {
      * @return Whether biometric weak lock is installed and that the front facing camera exists
      */
     public boolean isBiometricWeakInstalled() {
-        // Check that the system flag was set
-        if (!OPTION_ENABLE_FACELOCK.equals(getString(LOCKSCREEN_OPTIONS))) {
-            return false;
-        }
-
         // Check that it's installed
         PackageManager pm = mContext.getPackageManager();
         try {