FAFT: Fix firmware_TPMNotCorruptedDevMode by explicitly stopping tcsd/trunksd

tcsd/trunksd is no longer stopped when running a FAFT test. Explicitly call
APIs to stop/restart tcsd/trunksd.

BUG=chrome-os-partner:62150
TEST=Ran firmware_TPMNotCorruptedDevMode and passed the modified code.

Change-Id: I7de502820f741ed52c5230ac53a7c28fa86e635f
Reviewed-on: https://chromium-review.googlesource.com/436245
Commit-Ready: Wai-Hong Tam <waihong@google.com>
Tested-by: Wai-Hong Tam <waihong@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Andrey Pronin <apronin@chromium.org>
diff --git a/client/cros/faft/rpc_functions.py b/client/cros/faft/rpc_functions.py
index 90d8213..fa1f022 100755
--- a/client/cros/faft/rpc_functions.py
+++ b/client/cros/faft/rpc_functions.py
@@ -640,6 +640,14 @@
         """Retrieve tpm kernel data key version."""
         return self._tpm_handler.get_kernel_key_version()
 
+    def _tpm_stop_daemon(self):
+        """Stop tpm related daemon."""
+        return self._tpm_handler.stop_daemon()
+
+    def _tpm_restart_daemon(self):
+        """Restart tpm related daemon which was stopped by stop_daemon()."""
+        return self._tpm_handler.restart_daemon()
+
     def _cgpt_get_attributes(self):
         """Get kernel attributes."""
         rootdev = self._system_get_root_dev()