fix: prevent StackOverflowError from deeply nested GeometryCollection in GeoJsonParser

[ZeroX-404]

Description:

## Problem
`GeoJsonParser.parseGeometry()` and `createGeometryCollection()` call each 
other recursively with no depth limit. A malicious GeoJSON file containing 
deeply nested `GeometryCollection` objects triggers a `StackOverflowError`, 
crashing any Android app that loads the file via `GeoJsonLayer`.

**Vulnerable call chain:**

parseGeometry()
→ createGeometry()
→ createGeometryCollection()
→ parseGeometry() // unbounded recursion

A PoC GeoJSON file of ~93KB with 2000 levels of nesting is sufficient 
to trigger the crash.

## Fix
- Add `MAX_GEOMETRY_DEPTH = 20` constant
- Add private `parseGeometry(JSONObject, int depth)` overload
- Pass depth counter through `createGeometry()` and `createGeometryCollection()`
- Geometries exceeding the limit are ignored with a `Log.w()` warning

## Testing
Verified that parsing a GeoJSON with 2000 nesting levels no longer 
throws `StackOverflowError` after this fix.

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