Add constant for @ElementsIntoSet in ClassNames

RELNOTES=n/a
PiperOrigin-RevId: 537421754
diff --git a/java/dagger/hilt/processor/internal/ClassNames.java b/java/dagger/hilt/processor/internal/ClassNames.java
index 5a62715..ec2e73e 100644
--- a/java/dagger/hilt/processor/internal/ClassNames.java
+++ b/java/dagger/hilt/processor/internal/ClassNames.java
@@ -83,6 +83,7 @@
       get("dagger.multibindings", "Multibinds");
   public static final ClassName INTO_MAP = get("dagger.multibindings", "IntoMap");
   public static final ClassName INTO_SET = get("dagger.multibindings", "IntoSet");
+  public static final ClassName ELEMENTS_INTO_SET = get("dagger.multibindings", "ElementsIntoSet");
   public static final ClassName STRING_KEY = get("dagger.multibindings", "StringKey");
   public static final ClassName PROVIDES =
       get("dagger", "Provides");