Make ActionTemplateExpansion's skyfunction name publically visible.

PiperOrigin-RevId: 216407342
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/SkyFunctions.java b/src/main/java/com/google/devtools/build/lib/skyframe/SkyFunctions.java
index c42430d..c21ce5c 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/SkyFunctions.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/SkyFunctions.java
@@ -130,7 +130,7 @@
   // Non-hermetic because accesses package locator
   public static final SkyFunctionName EXTERNAL_PACKAGE =
       SkyFunctionName.createNonHermetic("EXTERNAL_PACKAGE");
-  static final SkyFunctionName ACTION_TEMPLATE_EXPANSION =
+  public static final SkyFunctionName ACTION_TEMPLATE_EXPANSION =
       SkyFunctionName.createHermetic("ACTION_TEMPLATE_EXPANSION");
   public static final SkyFunctionName LOCAL_REPOSITORY_LOOKUP =
       SkyFunctionName.createHermetic("LOCAL_REPOSITORY_LOOKUP");