Allow InfoWindow to be open while panning

[tobrun]

We’re hearing of the need to improve our InfoWindow setup.

We identified two improvements:

• Showing multiple InfoWindows at the same time (handled in Allowing multiple InfoWindows to be visible at a time #3115)
• Having the InfoWindow remain opened while panning (handled in this issue)

I'm working on the same branch as #3115 to be able to identify performance problems early on.

cc @zugaldia @incanus @bleege

[tobrun]

I was able to sync SurfaceView changes to the overlain default InfoWindow while still being performant. Now I need to investigate if it is still performant to sync a repositioned InfoWindow as landed in #2273.

The code required to reposition in #2273 is more complex as used in current progress, because this is a hot code path we need to watch out for performance loss.

Standard InfoWindow can be viewed here.
Custom InfoWindowAdapter can be viewed here

[tobrun]

I was able to also sync the repositioned InfoWindow from #2273

Progress can be viewed here

Just need to clean up the code and PR.

[tobrun]

@zugaldia I already pushed the code to your branch. So we can have 👀 on progress and you can continue your work. Will clean up / optimise later today

[zugaldia]

@tobrun Great job, let's clean up the code and make sure we aren't creating any unexpected leaks and then we're ready for a PR.