Use Bazel Preconditions variant which avoids varargs array creation

Reduces garbage.

--
MOS_MIGRATED_REVID=109914243
diff --git a/src/main/java/com/google/devtools/build/lib/actions/ActionInputHelper.java b/src/main/java/com/google/devtools/build/lib/actions/ActionInputHelper.java
index b4c6121..09558bf 100644
--- a/src/main/java/com/google/devtools/build/lib/actions/ActionInputHelper.java
+++ b/src/main/java/com/google/devtools/build/lib/actions/ActionInputHelper.java
@@ -17,9 +17,9 @@
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Function;
 import com.google.common.base.Functions;
-import com.google.common.base.Preconditions;
 import com.google.common.collect.Collections2;
 import com.google.common.collect.Iterables;
+import com.google.devtools.build.lib.util.Preconditions;
 
 import java.util.ArrayList;
 import java.util.Collection;