add back @Deprecated in ViewUtil (#44011)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/44011

Add back `Deprecated` annotation which was removed in D55651762

Changelog:
[Internal] internal

Reviewed By: javache

Differential Revision: D55955345

fbshipit-source-id: bc255983a57fa01e63b17400079cf4215de9a41f

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

@@ -31,6 +31,7 @@ public object ViewUtil {
    * @param viewTag tag of the view this is event is dispatched to
    * @param surfaceId ID of the corresponding surface
    */
+  @Suppress("DEPRECATION")
   @JvmStatic
   @UIManagerType
   public fun getUIManagerType(viewTag: Int, surfaceId: Int): Int {
@@ -59,5 +60,10 @@ public object ViewUtil {
    * @param viewTag react tag
    * @return if the react tag received by parameter is a RootTag or not.
    */
-  @JvmStatic public fun isRootTag(viewTag: Int): Boolean = viewTag % 10 == 1
+  @Deprecated(
+      "You should not check the tag of the view to inspect if it's the rootTag. " +
+          "Relying on this logic could make your app/library break in the future.",
+      ReplaceWith(""))
+  @JvmStatic
+  public fun isRootTag(viewTag: Int): Boolean = viewTag % 10 == 1
 }