print test env info

Change-Id: I4b858bd95af5365157a7a6f6c99eddf0d75d4f29
diff --git a/runners/host/test_runner.py b/runners/host/test_runner.py
index df6e282..db60492 100644
--- a/runners/host/test_runner.py
+++ b/runners/host/test_runner.py
@@ -247,6 +247,8 @@
             ControllerError is raised if no corresponding config can be found,
             or if the controller module has already been registered.
         """
+        logging.info("cwd: %s", os.getcwd())
+        logging.info("adb devices: %s", module.list_adb_devices())
         TestRunner.verifyControllerModule(module)
         module_ref_name = module.__name__.split('.')[-1]
         if module_ref_name in self.controller_registry: