Revert "[SettingsProvider] Remove @Readable for NFC_PAYMENT_DEFA..."

Revert "Add an exception for Settings.Secure.NFC_PAYMENT_DEFAULT..."

Revert submission 14326766-b/174151290

Reason for revert: potential test error for b/186717555
Reverted Changes:
I97fcd5550:[SettingsProvider] Remove @Readable for NFC_PAYMEN...
I6e55bef75:Add an exception for Settings.Secure.NFC_PAYMENT_D...

Bug: 186717555
Bug: 182283321
Bug: 174151290
Change-Id: Ib84c57b855ffe10870fda2568a7499746f0d2335