add setTexture to Android API

android/src/main/cpp/filament_android.cpp

@@ -198,5 +198,9 @@ extern "C" {
   void clear_assets(void* viewer) {
     ((FilamentViewer*)viewer)->clearAssets();
   }
+
+  void set_texture(void* asset, const char* assetPath, int renderableIndex) {
+    ((SceneAsset*)asset)->setTexture(assetPath, renderableIndex);
+  }
   
 }

android/src/main/kotlin/app/polyvox/filament/FilamentInterop.kt

@@ -71,4 +71,7 @@ interface FilamentInterop : Library {
     fun remove_ibl(viewer:Pointer);
 
     fun set_background_image(viewer:Pointer, path:String);
+    
+    fun set_texture(asset:Pointer, path:String, renderableIndex:Int);
 }
+

android/src/main/kotlin/app/polyvox/filament/FilamentView.kt

@@ -170,7 +170,7 @@ PlatformView  {
                 _lib.load_skybox(_viewer!!, loader.getLookupKeyForAsset(args))                
                 result.success("OK");
             }
-             "loadIbl" -> {
+            "loadIbl" -> {
                 val args = call.arguments as String
                 val loader = FlutterInjector.instance().flutterLoader()
 
@@ -211,6 +211,13 @@ PlatformView  {
                 )
                 result.success(Pointer.nativeValue(assetPtr));
             }
+            "setTexture" -> {
+              val args = call.arguments as ArrayList<*>
+              val loader = FlutterInjector.instance().flutterLoader()
+              val assetPtr = Pointer(args[0] as Long);
+              _lib.set_texture(assetPtr, loader.getLookupKeyForAsset(args[1] as String), args[2] as Int)
+              result.success("OK");
+            }
             "setCamera" -> {
                 val args = call.arguments as ArrayList<*>
                 val success = _lib.set_camera(