Controller position stream

[porfirioribeiro]

Sometimes we need to do something when the map position changes.
It can be done at map level using onPositionChanged or on plugins with the rebuild stream.
But i think it should be possible to be notified of map changes with the controller.

I thought about reusing the existing _onMoveSink and changing its type from Null to MapPosition and that might be a breaking change?

The example will not run because it depends on androidX that i added on PR #504

[johnpryan]

I don't think this an API that flutter_map needs to provide. Can't users choose to use package:location if the want to?

[johnpryan]

There's now a sample that shows how to do this with package:location: #447

[porfirioribeiro]

Its not exactly the same problem.
That sample is to move the map to the current GPS location

My PR was just to be able to subscribe the map position, was able to do it on my side, but i think was a nice feature to add

[johnpryan]

I see, thanks for the clarification

[johnpryan]

Can you fix the merge conflicts?