fix: set controller to lottie.asset (#309)

Author: wasabeef

example/lib/gen/assets.gen.dart

@@ -407,6 +407,7 @@ class LottieGenImage {
   }) {
     return Lottie.asset(
       _assetName,
+      controller: controller,
       animate: animate,
       frameRate: frameRate,
       repeat: repeat,

example_resources/lib/gen/assets.gen.dart

@@ -63,6 +63,7 @@ class LottieIntegration extends Integration {
   }) {
     return Lottie.asset(
       _assetName,
+      controller: controller,
       animate: animate,
       frameRate: frameRate,
       repeat: repeat,