Roll src/third_party/cros_system_api/ 938e6c463..9d7cd6e71 (4 commits)

https://chromium.googlesource.com/chromiumos/platform2/system_api.git/+log/938e6c463847..9d7cd6e7198b

$ git log 938e6c463..9d7cd6e71 --date=short --no-merges --format='%ad %ae %s'
2020-01-09 victorhsieh Convert boot lockbox responses to simple message
2020-01-08 yichengli system_api: u2f: Rename VerificationType enum values
2020-01-14 jonmann shill: Add support for retrieving WiFi credentials.
2020-01-13 matterchen system_api: Add ip field for cicerone service proto

Created with:
  roll-dep src/third_party/cros_system_api

Bug: 966270
Change-Id: Ie974e7f2e243a392b331c1e3f55ddcffb85e58fd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2015610Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Jon Mann <jonmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#734290}

DEPS

@@ -894,7 +894,7 @@ deps = {
 
   # For Linux and Chromium OS.
   'src/third_party/cros_system_api': {
-      'url': Var('chromium_git') + '/chromiumos/platform2/system_api.git' + '@' + '938e6c4638472c79ed28356d95b65dfc9ec82df5',
+      'url': Var('chromium_git') + '/chromiumos/platform2/system_api.git' + '@' + '9d7cd6e7198b2e6b4430697e8de2dc8eead60148',
       'condition': 'checkout_linux',
   },