Add OkHttp tests to the generated ART MTS definition.

Add `MtsLibcoreOkHttpTestCases` to the generated ART MTS definition.

Add this test module to the existing ART MTS shard 02.

Test: m mts && mts-tradefed run commandAndExit mts-art
Test: m mts && mts-tradefed run commandAndExit mts-art-shard-02
Bug: 167385698
Change-Id: I7c0abf96a9e2a5b9bab0add638a3b51f51083dd4
diff --git a/test/utils/regen-test-files b/test/utils/regen-test-files
index 63793ff..d9cd3e1 100755
--- a/test/utils/regen-test-files
+++ b/test/utils/regen-test-files
@@ -879,6 +879,7 @@
         "CtsLibcoreLegacy22TestCases",
         "CtsLibcoreOjTestCases",
         "CtsLibcoreWycheproofBCTestCases",
+        "MtsLibcoreOkHttpTestCases",
     ]
     other_cts_libcore_tests_shard = self.create_mts_test_shard(
         "CTS Libcore OJ tests", other_cts_libcore_tests_shard_tests,