feat(step097): preserve B fixes for unified V15 source

platform/android/MapLibreAndroid/src/main/java/org/maplibre/android/maps/MapLibreMap.java

@@ -12,6 +12,7 @@ import androidx.annotation.FloatRange;
 import androidx.annotation.IntRange;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.annotation.RestrictTo;
 import androidx.annotation.Size;
 import androidx.annotation.UiThread;
 
@@ -43,6 +44,7 @@ import org.maplibre.android.log.Logger;
 import org.maplibre.android.offline.OfflineRegionDefinition;
 import org.maplibre.android.style.expressions.Expression;
 
+import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -68,6 +70,7 @@ public final class MapLibreMap {
   private final OnGesturesManagerInteractionListener onGesturesManagerInteractionListener;
   private final List<Style.OnStyleLoaded> awaitingStyleGetters = new ArrayList<>();
   private final List<OnDeveloperAnimationListener> developerAnimationStartedListeners;
+  private final List<OnDestroyListener> onDestroyListeners = new ArrayList<>();
 
   @Nullable
   private Style.OnStyleLoaded styleLoadedCallback;
@@ -91,6 +94,19 @@ public final class MapLibreMap {
 
   private boolean debugActive;
   private boolean started;
+  private boolean destroyed;
+
+  /** Internal map-lifetime observer used by map-owned integrations. */
+  @RestrictTo(RestrictTo.Scope.LIBRARY)
+  public interface OnDestroyListener {
+    void onDestroy();
+  }
+
+  /** Removable registration for an internal observer of this concrete map's destruction. */
+  @RestrictTo(RestrictTo.Scope.LIBRARY)
+  public interface OnDestroyListenerRegistration {
+    void remove();
+  }
 
   MapLibreMap(NativeMap map, Transform transform, UiSettings ui, Projection projection,
               OnGesturesManagerInteractionListener listener, CameraChangeDispatcher cameraChangeDispatcher,
@@ -254,6 +270,24 @@ public final class MapLibreMap {
     }
   }
 
+  /** Registers a removable observer for destruction of this concrete map instance. */
+  @NonNull
+  @RestrictTo(RestrictTo.Scope.LIBRARY)
+  public OnDestroyListenerRegistration addOnDestroyListener(@NonNull OnDestroyListener listener) {
+    if (destroyed) {
+      listener.onDestroy();
+      return () -> { };
+    }
+    onDestroyListeners.add(listener);
+    WeakReference<MapLibreMap> mapReference = new WeakReference<>(this);
+    return () -> {
+      MapLibreMap map = mapReference.get();
+      if (map != null) {
+        map.onDestroyListeners.remove(listener);
+      }
+    };
+  }
+
   /**
    * Called when the hosting Activity/Fragment onStart() method is called.
    */
@@ -304,6 +338,16 @@ public final class MapLibreMap {
    * Called when the hosting Activity/Fragment onDestroy()/onDestroyView() method is called.
    */
   void onDestroy() {
+    if (destroyed) {
+      return;
+    }
+    destroyed = true;
+    List<OnDestroyListener> listeners = new ArrayList<>(onDestroyListeners);
+    onDestroyListeners.clear();
+    for (OnDestroyListener listener : listeners) {
+      listener.onDestroy();
+    }
+    disposeWeatherRuntime();
     locationComponent.onDestroy();
     if (style != null) {
       style.clear();