Gate screen off unlock UDFPS until power optimitized

Flag: com.android.settings.flags.screen_off_unlock_power_optimization
Test: atest SetupFingerprintEnrollFinishTest
      atest FingerprintSettingsUnlockCategoryControllerTest
      atest FingerprintSettingsScreenOffUnlockUdfpsPreferenceControllerTest
Test: manual verify the function hide behind flag screen_off_unlock_power_optimization
Bug: 368465560
Bug: 377635539
Change-Id: Icf3ff83b2a2717228b54ec03e3c27228bb1cad93