Merge "Don't tie getPasswordComplexity to secure lock screen."

     * explicitly querying the parent profile screen lock complexity via {@link

     * #getParentProfileInstance}.

     *

     * <p>On devices not supporting {@link PackageManager#FEATURE_SECURE_LOCK_SCREEN} feature, the

     * password is always empty and this method returns {@link #PASSWORD_COMPLEXITY_NONE}.

     *

     * @throws IllegalStateException if the user is not unlocked.

     * @throws SecurityException if the calling application does not have the permission

     *                           {@link permission#REQUEST_PASSWORD_COMPLEXITY}