I need to surround an area (for example by LinearRings) and let the user to pick somewhere nearby

giving a few boundary coordinates(like LinearRing[ ]), an area can be surrounded by picker (Zoomed out enough) and a point can be picked inside or outside the area, alternatively

Start at the Android Google Maps picker entry point and trace how the current picker receives boundaries and returns a selected point. Clarify the expected LinearRing[] input, zoom behavior, and whether points inside and outside the area are both valid; done means the agreed boundary scenario works and its behavior is covered by the relevant tests.

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