Revert "Revert "run bp2build in mixed_mode_test.sh""

This reverts commit cb93d29aa99f62a55c5036c283bccd9ae8439032.

Reason for revert: retry this CL with additional changes in topic

Change-Id: Ibbb8926caef05c2177c06cb1c00795d407215f4a
diff --git a/tests/mixed_mode_test.sh b/tests/mixed_mode_test.sh
index b408fd3..f6fffad 100755
--- a/tests/mixed_mode_test.sh
+++ b/tests/mixed_mode_test.sh
@@ -14,7 +14,9 @@
   setup
   create_mock_bazel
 
-  STANDALONE_BAZEL=true run_bazel info
+  run_soong bp2build
+
+  run_bazel info --config=bp2build
 }
 
 test_bazel_smoke