[Auto Pin Confirm]: Fix the usage of LockPatternUtils#isAutoPinConfirmFeatureAvailable method

- The method isAutoPinConfirmFeatureAvailable is changed to static, so refactoring the code to use it properly.

Bug: 270315296
Test: Manual Test
Test: atest AutoPinConfirmPreferenceControllerTest
Test: atest ChooseLockPasswordTest
Change-Id: Idecaeca296b9ae9acdd0c094dcbb736db31b74b3