Reuse DraweeControllerBuilder instead of allocating one for every image

Reviewed By: astreet

Differential Revision: D2699801

fb-gh-sync-id: 883e788f0a5c7231bf26f1ba4149115a15487366

ReactAndroid/src/main/java/com/facebook/react/views/image/ReactImageManager.java

@@ -32,7 +32,7 @@ public String getName() {
     return REACT_CLASS;
   }
 
-  private final @Nullable AbstractDraweeControllerBuilder mDraweeControllerBuilder;
+  private @Nullable AbstractDraweeControllerBuilder mDraweeControllerBuilder;
   private final @Nullable Object mCallerContext;
 
   public ReactImageManager(
@@ -43,16 +43,20 @@ public ReactImageManager(
   }
 
   public ReactImageManager() {
+    // Lazily initialize as FrescoModule have not been initialized yet
     mDraweeControllerBuilder = null;
     mCallerContext = null;
   }
 
   @Override
   public ReactImageView createViewInstance(ThemedReactContext context) {
+    if (mDraweeControllerBuilder == null) {
+      mDraweeControllerBuilder = Fresco.newDraweeControllerBuilder();
+    }
+
     return new ReactImageView(
         context,
-        mDraweeControllerBuilder == null ?
-            Fresco.newDraweeControllerBuilder() : mDraweeControllerBuilder,
+        mDraweeControllerBuilder,
         mCallerContext);
   }