Fix BuildIntegrationTest to add a strategy module

This was missing from the test setup, blocking open sourcing tests that
actually need one. The only integration test that currently inherits it
works by accident - it doesn't strictly require a strategy module.

PiperOrigin-RevId: 271104998
diff --git a/src/test/java/com/google/devtools/build/lib/testutil/TestConstants.java b/src/test/java/com/google/devtools/build/lib/testutil/TestConstants.java
index 38f9d36..f5a330c 100644
--- a/src/test/java/com/google/devtools/build/lib/testutil/TestConstants.java
+++ b/src/test/java/com/google/devtools/build/lib/testutil/TestConstants.java
@@ -85,6 +85,8 @@
       "com.google.devtools.build.lib.bazel.rules.BazelRuleClassProvider";
   public static final String TEST_RULE_MODULE =
       "com.google.devtools.build.lib.bazel.rules.BazelRulesModule";
+  public static final String TEST_STRATEGY_MODULE =
+      "com.google.devtools.build.lib.bazel.rules.BazelStrategyModule";
   public static final String TEST_REAL_UNIX_FILE_SYSTEM =
       "com.google.devtools.build.lib.unix.UnixFileSystem";
   public static final String TEST_WORKSPACE_STATUS_MODULE =