Prevent exception SymbolLocationLayerRenderer with new style (#3369)

platform/android/MapLibreAndroid/src/main/java/org/maplibre/android/location/SymbolLocationLayerRenderer.java

@@ -319,6 +319,11 @@ final class SymbolLocationLayerRenderer implements LocationLayerRenderer {
   }
 
   private void refreshSource() {
+    // prevents exception when other style has been set with an update in flight
+    // https://github.com/maplibre/maplibre-native/issues/3348
+    if (!style.isFullyLoaded()) {
+      return;
+    }
     GeoJsonSource source = style.getSourceAs(LOCATION_SOURCE);
     if (source != null) {
       locationSource.setGeoJson(locationFeature);

platform/android/MapLibreAndroid/src/test/java/org/maplibre/android/location/LocationLayerControllerTest.kt

@@ -966,6 +966,7 @@ class LocationLayerControllerTest {
         val locationSource = Mockito.mock(GeoJsonSource::class.java)
         Mockito.`when`<Any?>(style.getSourceAs(LocationComponentConstants.LOCATION_SOURCE))
             .thenReturn(locationSource)
+        Mockito.`when`(style.isFullyLoaded).thenReturn(true)
         val sourceProvider = buildLayerProvider()
         Mockito.`when`(
             sourceProvider.generateSource(