Disable loading XML on main thread

Summary:
## Summary

Now that XML resources are loaded via Fresco decoder, this change removes the custom branch that attempts to load drawables on the main thread. Loading (i.e. binary XML decompression) is performed on a background decoder thread from Fresco the same as every other image type.

## Changelog
[Android][Fixed] - Avoid blocking the main thread when decompressing drawable resources

Differential Revision: D63476282

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/image/ReactImageView.kt

@@ -48,7 +48,6 @@ import com.facebook.react.common.annotations.UnstableReactNativeAPI
 import com.facebook.react.common.annotations.VisibleForTesting
 import com.facebook.react.common.build.ReactBuildConfig
 import com.facebook.react.internal.featureflags.ReactNativeFeatureFlags
-import com.facebook.react.internal.featureflags.ReactNativeFeatureFlags.loadVectorDrawablesOnImages
 import com.facebook.react.modules.fresco.ReactNetworkImageRequest
 import com.facebook.react.uimanager.BackgroundStyleApplicator
 import com.facebook.react.uimanager.LengthPercentage
@@ -394,12 +393,7 @@ public class ReactImageView(
           else -> REMOTE_IMAGE_FADE_DURATION_MS
         }
 
-    val drawable = getDrawableIfUnsupported(imageSourceSafe)
-    if (drawable != null) {
-      maybeUpdateViewFromDrawable(drawable)
-    } else {
-      maybeUpdateViewFromRequest(doResize)
-    }
+    maybeUpdateViewFromRequest(doResize)
 
     isDirty = false
   }
@@ -474,34 +468,6 @@ public class ReactImageView(
     builder.reset()
   }
 
-  private fun maybeUpdateViewFromDrawable(drawable: Drawable) {
-    val shouldNotify = downloadListener != null
-
-    val eventDispatcher =
-        if (shouldNotify) {
-          UIManagerHelper.getEventDispatcherForReactTag((context as ReactContext), id)
-        } else {
-          null
-        }
-
-    eventDispatcher?.dispatchEvent(
-        createLoadStartEvent(UIManagerHelper.getSurfaceId(this@ReactImageView), id))
-
-    hierarchy.setImage(drawable, 1f, false)
-
-    if (eventDispatcher != null && imageSource != null) {
-      eventDispatcher.dispatchEvent(
-          createLoadEvent(
-              UIManagerHelper.getSurfaceId(this@ReactImageView),
-              id,
-              imageSource?.source,
-              width,
-              height))
-      eventDispatcher.dispatchEvent(
-          createLoadEndEvent(UIManagerHelper.getSurfaceId(this@ReactImageView), id))
-    }
-  }
-
   @VisibleForTesting
   public fun setControllerListener(controllerListener: ControllerListener<ImageInfo>?) {
     controllerForTesting = controllerListener
@@ -547,30 +513,6 @@ public class ReactImageView(
         else -> false
       }
 
-  /**
-   * Checks if the provided ImageSource should not be requested through Fresco and instead loaded
-   * directly from the resources table. Fresco explicitly does not support a number of drawable
-   * types like VectorDrawable but they can still be mounted in the image hierarchy.
-   *
-   * @param imageSource
-   * @return drawable resource if Fresco cannot load the image, null otherwise
-   */
-  private fun getDrawableIfUnsupported(imageSource: ImageSource): Drawable? {
-    if (!loadVectorDrawablesOnImages()) {
-      return null
-    }
-    val resourceName = imageSource.source
-    if (!imageSource.isResource || resourceName == null) {
-      return null
-    }
-    val drawableHelper = instance
-    val isVectorDrawable = drawableHelper.isVectorDrawable(context, resourceName)
-    if (!isVectorDrawable) {
-      return null
-    }
-    return drawableHelper.getResourceDrawable(context, resourceName)
-  }
-
   private val resizeOptions: ResizeOptions?
     get() {
       val width = Math.round(width.toFloat() * resizeMultiplier)