Add `CtsLibcoreOjTestCases` to the generated ART MTS definition.

Introduce an additional shard (shard 02) for CTS Libcore OJ tests
(`CtsLibcoreOjTestCases`).

Test: m mts && mts-tradefed run commandAndExit mts-art
Test: m mts && mts-tradefed run commandAndExit mts-art-shard-02
Bug: 182575630
Bug: 167385698
Change-Id: I3399476f04240d9e8c43af84996b1ece0c661927
diff --git a/test/utils/regen-test-files b/test/utils/regen-test-files
index a3db507..4b22d3d 100755
--- a/test/utils/regen-test-files
+++ b/test/utils/regen-test-files
@@ -804,11 +804,17 @@
           ["TODO(rpl): Find a way to express this list in a more concise fashion."])
       mts_test_shards.append(art_run_test_shard)
 
-    # Libcore CTS test shard.
-    libcore_cts_test_shard_num = len(mts_test_shards)
-    libcore_cts_test_shard = self.create_mts_test_shard(
-        "Libcore CTS tests", ["CtsLibcoreTestCases"], libcore_cts_test_shard_num, 2020)
-    mts_test_shards.append(libcore_cts_test_shard)
+    # CTS Libcore non-OJ tests (`CtsLibcoreTestCases`) shard.
+    cts_libcore_tests_shard_num = len(mts_test_shards)
+    cts_libcore_tests_shard = self.create_mts_test_shard(
+        "CTS Libcore non-OJ tests", ["CtsLibcoreTestCases"], cts_libcore_tests_shard_num, 2020)
+    mts_test_shards.append(cts_libcore_tests_shard)
+
+    # CTS Libcore OJ tests (`CtsLibcoreOjTestCases`) shard.
+    cts_libcore_oj_tests_shard_num = len(mts_test_shards)
+    cts_libcore_oj_tests_shard = self.create_mts_test_shard(
+        "CTS Libcore OJ tests", ["CtsLibcoreOjTestCases"], cts_libcore_oj_tests_shard_num, 2021)
+    mts_test_shards.append(cts_libcore_oj_tests_shard)
 
     for s in mts_test_shards:
       s.regen_test_plan_file()