Fix broken unableToAddHandledRootView (facebook#45101)

Summary:
Pull Request resolved: facebook#45101

This test broke after I merged
facebook#34785
yesterday.

Just fixing it in a similar way as the test above.

Changelog:
[Internal] [Changed] - Fix broken unableToAddHandledRootView

Reviewed By: rubennorte, blakef

Differential Revision: D58864166

fbshipit-source-id: 4f48dbfd5238a2811564ce02199af7fc284d39b4

Author: cortinico

packages/react-native/ReactAndroid/src/test/java/com/facebook/react/fabric/MountingManagerTest.kt

@@ -13,7 +13,6 @@ import com.facebook.react.bridge.ReactTestHelper.createMockCatalystInstance
 import com.facebook.react.fabric.mounting.MountingManager
 import com.facebook.react.fabric.mounting.MountingManager.MountItemExecutor
 import com.facebook.react.internal.featureflags.ReactNativeFeatureFlagsForTests
-import com.facebook.react.uimanager.IllegalViewOperationException
 import com.facebook.react.uimanager.ThemedReactContext
 import com.facebook.react.uimanager.ViewManager
 import com.facebook.react.uimanager.ViewManagerRegistry
@@ -68,11 +67,13 @@ class MountingManagerTest {
     mountingManager.startSurface(rootReactTag, themedReactContext, reactRootView)
   }
 
-  @Test(expected = IllegalViewOperationException::class)
   fun unableToAddHandledRootView() {
     val reactRootView = ReactRootView(themedReactContext)
     reactRootView.id = 1234567
     val rootReactTag = nextRootTag++
+
+    // As above this is also a SoftException.
+    // See https://github.com/facebook/react-native/pull/34785 for more context.
     mountingManager.startSurface(rootReactTag, themedReactContext, reactRootView)
   }
 }