Narrow return type of ContainingPackageLookupValue.withContainingPackage

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MOS_MIGRATED_REVID=105969015
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/ContainingPackageLookupValue.java b/src/main/java/com/google/devtools/build/lib/skyframe/ContainingPackageLookupValue.java
index 70bdf0d..b1c9129 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/ContainingPackageLookupValue.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/ContainingPackageLookupValue.java
@@ -42,7 +42,7 @@
     return new SkyKey(SkyFunctions.CONTAINING_PACKAGE_LOOKUP, id);
   }
 
-  static ContainingPackageLookupValue withContainingPackage(PackageIdentifier pkgId, Path root) {
+  public static ContainingPackage withContainingPackage(PackageIdentifier pkgId, Path root) {
     return new ContainingPackage(pkgId, root);
   }