Move TimestampGranularityMonitor to CommandEnvironment.

This is one of the last pieces of state in BlazeRuntime that isn't safe to
share across command invocations.

--
MOS_MIGRATED_REVID=117910631
diff --git a/src/test/java/com/google/devtools/build/lib/skyframe/TimestampBuilderTestCase.java b/src/test/java/com/google/devtools/build/lib/skyframe/TimestampBuilderTestCase.java
index 9ddfcb5..e4e15ef 100644
--- a/src/test/java/com/google/devtools/build/lib/skyframe/TimestampBuilderTestCase.java
+++ b/src/test/java/com/google/devtools/build/lib/skyframe/TimestampBuilderTestCase.java
@@ -138,6 +138,7 @@
       @Nullable EvaluationProgressReceiver evaluationProgressReceiver) {
     AtomicReference<PathPackageLocator> pkgLocator =
         new AtomicReference<>(new PathPackageLocator(outputBase, ImmutableList.of(rootDirectory)));
+    AtomicReference<TimestampGranularityMonitor> tsgmRef = new AtomicReference<>(tsgm);
     ExternalFilesHelper externalFilesHelper = new ExternalFilesHelper(pkgLocator, false);
     differencer = new RecordingDifferencer();
 
@@ -153,14 +154,14 @@
     final InMemoryMemoizingEvaluator evaluator =
         new InMemoryMemoizingEvaluator(
             ImmutableMap.<SkyFunctionName, SkyFunction>builder()
-                .put(SkyFunctions.FILE_STATE, new FileStateFunction(tsgm, externalFilesHelper))
+                .put(SkyFunctions.FILE_STATE, new FileStateFunction(tsgmRef, externalFilesHelper))
                 .put(SkyFunctions.FILE, new FileFunction(pkgLocator))
                 .put(
                     SkyFunctions.ARTIFACT,
                     new ArtifactFunction(Predicates.<PathFragment>alwaysFalse()))
                 .put(
                     SkyFunctions.ACTION_EXECUTION,
-                    new ActionExecutionFunction(skyframeActionExecutor, tsgm))
+                    new ActionExecutionFunction(skyframeActionExecutor, tsgmRef))
                 .put(
                     SkyFunctions.PACKAGE,
                     new PackageFunction(null, null, null, null, null, null, null))