debug/holder (#43746)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/43746

Mark relevant classes as nullsafe prior to Kotlin conversion.

changelog: [internal] internal

Reviewed By: rshest

Differential Revision: D55591487

fbshipit-source-id: dc3ee0070c7b14aaca4c13cfdcc2422ce8c1d5a5

packages/react-native/ReactAndroid/src/main/java/com/facebook/debug/holder/NoopPrinter.java

@@ -8,8 +8,10 @@
 package com.facebook.debug.holder;
 
 import com.facebook.debug.debugoverlay.model.DebugOverlayTag;
+import com.facebook.infer.annotation.Nullsafe;
 
 /** No-op implementation of {@link Printer}. */
+@Nullsafe(Nullsafe.Mode.LOCAL)
 public class NoopPrinter implements Printer {
 
   public static final NoopPrinter INSTANCE = new NoopPrinter();

packages/react-native/ReactAndroid/src/main/java/com/facebook/debug/holder/PrinterHolder.java

@@ -7,7 +7,10 @@
 
 package com.facebook.debug.holder;
 
+import com.facebook.infer.annotation.Nullsafe;
+
 /** Holder for debugging tool instance. */
+@Nullsafe(Nullsafe.Mode.LOCAL)
 public class PrinterHolder {
 
   private static Printer sPrinter = NoopPrinter.INSTANCE;