Previously, PoiChunk#empty would create a new empty poi chunk with
loaded already set to true, as no data was contained in the chunk.
This allowed the poi chunk to skip expensive trips to the main thread.
However, PoiChunk#parse used #empty to create the initial PoiChunk
instance that is then filled with data.
This leads to PoiChunks returned from #parse to already be marked as
loaded, preventing the then needed trip to the tick thread to update
things like the village distance tracker.
To fix this, this commit now marks the PoiChunks loaded state as false
if the parse logic actually read and parsed any data.
This allows the PoiChunk#load method to properly run its callbacks when
called for the first time.
The ZombieVillager#setConversionTime API method internally calls
startConversion which always broadcasts the entity event responsible for
playing the respective sound at the beginning of a conversion.
This is not always wanted by developers when modifying already
converting zombies in particular.
This commit expands the ZombieVillager interface with another overload
of the setConversionTime method that also takes a simple toggle flag
indicating whether or not the entity event should be published to the
world.
Bjarne Koll