Include actions in AspectValue#toString.

PiperOrigin-RevId: 244394660
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/AspectValue.java b/src/main/java/com/google/devtools/build/lib/skyframe/AspectValue.java
index f552b11..b46fd13 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/AspectValue.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/AspectValue.java
@@ -14,7 +14,6 @@
 
 package com.google.devtools.build.lib.skyframe;
 
-import com.google.common.base.MoreObjects;
 import com.google.common.base.Objects;
 import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableList;
@@ -507,7 +506,7 @@
 
   @Override
   public String toString() {
-    return MoreObjects.toStringHelper(this)
+    return getStringHelper()
         .add("label", label)
         .add("key", key)
         .add("location", location)