Mark classes of package uimanager as @Nullsafe

Summary:
All these classes are NullSafe, let's mark them as NullSafe(Local) to ensure lint detect errors in the future

bypass-github-export-checks

changelog: [internal] internal

Reviewed By: rshest

Differential Revision: D54027183

fbshipit-source-id: b87e3931642abaa22b84fd48f0504f36e9c3621f

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

@@ -7,6 +7,9 @@
 
 package com.facebook.react.uimanager;
 
+import com.facebook.infer.annotation.Nullsafe;
+
+@Nullsafe(Nullsafe.Mode.LOCAL)
 public class ReactInvalidPropertyException extends RuntimeException {
 
   public ReactInvalidPropertyException(String property, String value, String expectedValues) {

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

@@ -10,10 +10,12 @@ package com.facebook.react.uimanager;
 import android.os.Bundle;
 import android.view.ViewGroup;
 import androidx.annotation.Nullable;
+import com.facebook.infer.annotation.Nullsafe;
 import com.facebook.react.uimanager.common.UIManagerType;
 import java.util.concurrent.atomic.AtomicInteger;
 
 /** Interface for the root native view of a React native application */
+@Nullsafe(Nullsafe.Mode.LOCAL)
 public interface ReactRoot {
 
   /** This constant represents that ReactRoot hasn't started yet or it has been destroyed. */

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

@@ -7,7 +7,10 @@
 
 package com.facebook.react.uimanager;
 
+import com.facebook.infer.annotation.Nullsafe;
+
 /** Incremental counter for React Root View tag. */
+@Nullsafe(Nullsafe.Mode.LOCAL)
 public class ReactRootViewTagGenerator {
 
   // Keep in sync with ReactIOSTagHandles JS module - see that file for an explanation on why the