Revert "keyguard: dont show enter key when quick unlock is enabled"

This reverts commit 921d2ec7.


"But then you're giving out whether quick unlock is enabled or not; effectively giving knowledge to someone, who picked up your device, that they can bruteforce the PIN without ever being locked out."


Effectively, this will lead to bruteforce attacks.

Change-Id: I87c1408348b009e3b2e4375b6e99e65d809de1ab