Display fresco image on demand (#5160)

Summary:
[android][sample] Display fresco image on demand

Pull Request resolved: https://github.com/facebook/flipper/pull/5160

Reviewed By: antonk52

Differential Revision: D49411927

Pulled By: passy

fbshipit-source-id: 05d83d49df56f1e7eced2ce35d29880c9876b524

android/sample/src/main/java/com/facebook/flipper/sample/RootComponentSpec.java

@@ -125,11 +125,13 @@ public class RootComponentSpec {
                     .textSizeSp(20)
                     .clickHandler(RootComponent.triggerCrash(c)))
             .child(
-                FrescoVitoImage2.create(c)
-                    .uri(Uri.parse("https://fbflipper.com/img/icon.png"))
-                    .marginDip(YogaEdge.ALL, 10)
-                    .widthDip(150)
-                    .heightDip(150))
+                displayImage
+                    ? FrescoVitoImage2.create(c)
+                        .uri(Uri.parse("https://fbflipper.com/img/icon.png"))
+                        .marginDip(YogaEdge.ALL, 10)
+                        .widthDip(150)
+                        .heightDip(150)
+                    : null)
             .build();
 
     return VerticalScroll.create(c).childComponent(col).build();