Roll src/third_party/cros_system_api/ 4bab6cb11..cdae7443f (8 commits)

https://chromium.googlesource.com/chromiumos/platform2/system_api.git/+log/4bab6cb11c26..cdae7443f8cf

$ git log 4bab6cb11..cdae7443f --date=short --no-merges --format='%ad %ae %s'
2019-12-06 cylai system_api: change licenses terms
2019-12-17 yusukes system_api: Add cpus field to StartTerminaVm
2019-12-12 garrick system_api: Add subnet index field for plugin VM.
2019-12-02 andrewlassalle dlcservice: Create/delete metadata folder for DLCs
2019-11-14 xzhou system_api: allow multiple exclude credentials.
2019-11-22 henryhsu system_api: Add dobule tap power policy
2019-11-19 garrick system_api: Update patchpanel interface for Crostini
2019-12-05 norvez system_api: remove norvez@ from OWNERS

Created with:
  roll-dep src/third_party/cros_system_api

BUG=1011559
TEST=try

Change-Id: Idff9ee27bb2f4e01ead3b8dbe303d02f7409282f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1974290
Commit-Queue: Yusuke Sato <yusukes@chromium.org>
Commit-Queue: Yury Khmel <khmel@chromium.org>
Auto-Submit: Yusuke Sato <yusukes@chromium.org>
Reviewed-by: Yury Khmel <khmel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#726039}

DEPS

@@ -879,7 +879,7 @@ deps = {
 
   # For Linux and Chromium OS.
   'src/third_party/cros_system_api': {
-      'url': Var('chromium_git') + '/chromiumos/platform2/system_api.git' + '@' + '4bab6cb11c260897682b3b6d2bb21f12796805fb',
+      'url': Var('chromium_git') + '/chromiumos/platform2/system_api.git' + '@' + 'cdae7443f8cf261d8b078d5294ce89c841598172',
       'condition': 'checkout_linux',
   },