Note: Relates to SPIGOT-6159 but taking into account more points

First, related to SPIGOT-6159 FallingBlock#getTime() and FallingBlock#setTime() should be added to manage FallingBlock Time state, and remove the overriden method CraftFallingBlock#setLivedTicks() as it should not change the Time value since is used for different things.

Moreover, to expose EntityFallingBlock#fallHurtAmount and EntityFallingBlock#fallHurtMax also CraftFallingBlock#getFallHurtAmount() CraftFallingBlock#setFallHurtAmount() CraftFallingBlock#getFallHurtMax() CraftFallingBlock#setFallHurtMax() should be added.