Deprecate legacy UIBlock and addUIBlock/prependUIBlock APIs

Summary:
Deprecate `UIBlock`, `NativeViewHierarchyManager`, and the `addUIBlock`/`prependUIBlock` methods on `UIManagerModule`. These are legacy Paper architecture APIs that are already non-functional stubs. Libraries should migrate to `UIManagerListener` or View Commands.

The Fabric replacement for `UIBlock` already exists at `com.facebook.react.fabric.interop.UIBlock` and uses `UIBlockViewResolver` instead of `NativeViewHierarchyManager`.

Changelog:
[Android][Deprecated] - Deprecate `UIBlock` interface and `UIManagerModule.addUIBlock`/`prependUIBlock` methods. Use `UIManagerListener` or View Commands instead.

Reviewed By: javache

Differential Revision: D104995161

fbshipit-source-id: 447067129765761a587a8fc5a1b57710b29a1132

Author: cortinico

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/UIBlock.kt

@@ -7,7 +7,13 @@
 
 package com.facebook.react.uimanager
 
-/** A task to execute on the UI View for third party libraries. */
+/**
+ * A task to execute on the UI View for third party libraries.
+ *
+ * @deprecated This interface is part of the Legacy Architecture and will be removed in a future
+ *   release. Use [com.facebook.react.bridge.UIManagerListener] or View Commands instead.
+ */
+@Deprecated("Use UIManagerListener or View Commands instead")
 public fun interface UIBlock {
   public fun execute(
       @Suppress("DEPRECATION") nativeViewHierarchyManager: NativeViewHierarchyManager

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/UIManagerModule.java

@@ -568,20 +568,23 @@ public void sendAccessibilityEvent(int tag, int eventType) {
    * after all currently queued view updates have completed.
    *
    * @param block that contains UI logic you want to execute.
-   *     <p>Usage Example:
-   *     <p>UIManagerModule uiManager = reactContext.getNativeModule(UIManagerModule.class);
-   *     uiManager.addUIBlock(new UIBlock() { public void execute (NativeViewHierarchyManager nvhm)
-   *     { View view = nvhm.resolveView(tag); // ...execute your code on View (e.g. snapshot the
-   *     view) } });
+   * @deprecated This method is a no-op stub retained for backward compatibility. Use {@link
+   *     UIManagerListener} or View Commands instead.
    */
+  @Deprecated
+  @SuppressWarnings("deprecation")
   public void addUIBlock(UIBlock block) {}
 
   /**
    * Schedule a block to be executed on the UI thread. Useful if you need to execute view logic
    * before all currently queued view updates have completed.
    *
    * @param block that contains UI logic you want to execute.
+   * @deprecated This method is a no-op stub retained for backward compatibility. Use {@link
+   *     UIManagerListener} or View Commands instead.
    */
+  @Deprecated
+  @SuppressWarnings("deprecation")
   public void prependUIBlock(UIBlock block) {}
 
   @Override