GOOGLE PATCHED THIS METHOD.IF YOU UPDATED GOOGLE PLAY SERVICES TO LATEST VERSION. YOU CANNOT DOWNGRADE IT USING .apk that i attached HERE!.
You need to have a bit older Google Play Services to disable FrpUpdateIntentService. Latest Google Play Services is not downgradeable anymore.
Latest Google Play Services Has Patched Frp Lock Disable by hiding "FrpUpdateIntentService" without disabling it, it's impossible to disable frp lock with google account. it's important to disable FrpUpdateIntentService for FRP Lock disable method to work.
USE AT OWN RISK, IF YOU HAVE CUSTOM KERNEL THEN IF GOOGLE PLAY SERVICES WILL UPDATE SOMEHOW THEN YOU WILL GET "Custom Binary Blocked by FRP Lock"
To avoid Custom Binary Blocked By FRP Lock when google play services updated
Then you have no choice. you need to live without google account added.
(1 Downgrade Google Play Services Method still exists. ask me in private for more info about that downgrade)
(Maybe it's still Downgradeable, but there is 61% it's not downgradeable using apk anymore)