[Backport release/v0.19] [maps-ios] [maps-android] Expose ModelSource (#9973)

Backport 3f201974d0f4475a41ccbddfe2f0080fe07e84cb from #9292.

cc @mapbox/maps-android
cc @mapbox/sdk-platform
cc @mapbox/maps-ios
cc @mapbox/gl-native

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Co-authored-by: Roman Laitarenko <roman.laitarenko@mapbox.com>
Co-authored-by: Changelog autocreator bot <actions@github.com>
GitOrigin-RevId: 84746aba8aabec4163a3015b5fad9515855b7b28

Author: 3 people

CHANGELOG.md

@@ -12,6 +12,8 @@ Mapbox welcomes participation and contributions from everyone.
 
 ### Bug fixes 🐞
 * Fix elevated line bevel join artifacts at sharp corners.
+### Features ✨ and improvements 🏁
+* Add `ModelSource` support with `Model`, `ModelMaterialOverride`, and `ModelNodeOverride` to enable interactive 3D models. Material overrides allow customization of color, emissive strength, opacity, and color mix intensity. Node overrides enable control of model part transformations such as rotating doors, landing gear, or propellers. Models can be updated via source-driven approach (modifying `ModelSource.models` directly) or feature-state driven approach (using expressions with feature state for dynamic control). For implementation examples, see `Interactive3DModelFeatureStateExample` (SwiftUI), `Interactive3DModelSourceExample` (UIKit), and `Animated3DModelSourceExample` (SwiftUI).
 
 ## 11.19.0-beta.1 - 28 January, 2026