Introduce new config for device entry icon longpress

So UDFPS devices don't need to manually override
config_lockIconLongPress.

Fixes: 290595381
Flag: ACONFIG com.android.systemui.device_entry_udfps_refactor NEXTFOOD
Test: manually see that UDFPS devices use a 100ms
longpress on the lock icon vs non UDFPS devices use 200ms

Change-Id: I4dabb5f4214084120562307498626b6c9e63b15c