[Backport release/v0.15] [maps-ios][maps-android] Expose line cutout opacity and width (#6122)

Backport f264ec16c9acbad90e8115d429652bfac73179bc from #5884.

cc @mapbox/maps-ios
cc @mapbox/maps-android

Co-authored-by: Roman Laitarenko <[email protected]>
Co-authored-by: Ramon <[email protected]>
GitOrigin-RevId: 59c54aca6dc1fa66c14f430b1deb4bf513896804

Author: 3 people

CHANGELOG.md

@@ -12,6 +12,7 @@ Mapbox welcomes participation and contributions from everyone.
 
 ## 11.15.0-beta.2 - 15 August, 2025
 * Add configuration option to configure attribution button tint color.
+* Expose `LineLayer.lineCutoutOpacity` and `LineLayer.lineCutoutWidth` to make route lines visible through obstructing 3D buildings and other aboveground features.
 
 ## 11.15.0-beta.1 - 12 August, 2025
 

Sources/Examples/All Examples/Annotations/DynamicViewAnnotationExample.swift

@@ -296,6 +296,9 @@ private final class Route {
         routeLayer.lineBorderWidth = .constant(2)
         routeLayer.lineBorderColor = .expression(colorExpression(normal: "#666666", selected: "#327AC2"))
         routeLayer.slot = .middle
+        // make route lines visible through obstructing 3D buildings and other aboveground features
+        routeLayer.lineCutoutWidth = .constant(30)
+        routeLayer.lineCutoutOpacity = .constant(0.2)
         try! mapView.mapboxMap.addLayer(routeLayer)
 
         // Annotation