Add asynchronous deletion option for Android renderer backend (#4287)

platform/android/MapLibreAndroid/src/cpp/map_renderer.hpp

@@ -92,6 +92,8 @@ public:
     AndroidRendererBackend& getRendererBackend() const { return *backend; }
     const TaggedScheduler& getThreadPool() const { return threadPool; }
 
+    void SetAsyncRendererCleanup(bool value) { asyncRendererCleanup = value; }
+
 protected:
     // Called from the GL Thread //
 
@@ -156,6 +158,7 @@ private:
 
     bool framebufferSizeChanged = false;
     bool swapBehaviorFlush = false;
+    bool asyncRendererCleanup = false;
 
     mapbox::base::WeakPtrFactory<Scheduler> weakFactory{this};
     // Do not add members here, see `WeakPtrFactory`