Custom setup strategy

[VitalyNikonorov]

Add functionality for adding custom strategy for restoring some specific fields.
It can be very useful when:

• You wanna add nontrivial logic for new and old value. (e.g. while view was in recreating process some changes happened in presenter, and you do not want lose them)
• With Kotlin lateinit fields (e.g. instance state has been saved before lateinit var has been initialised and then you don't want set null in lateinit var after restoring state)