Roll src/third_party/cros_system_api/ 9ae272cf7..77b1345ec (1 commit)

https://chromium.googlesource.com/chromiumos/platform2/system_api.git/+log/9ae272cf722a..77b1345ec0eb

$ git log 9ae272cf7..77b1345ec --date=short --no-merges --format='%ad %ae %s'
2020-09-11 sammc power: Add preferred_minimum_external_power to PowerSupplyProperties.

Created with:
  roll-dep src/third_party/cros_system_api

BUG=b:160854398

Change-Id: If5647a300c34ede6c809f8878d258c39ccc9e929
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2427949
Auto-Submit: Sam McNally <sammc@chromium.org>
Reviewed-by: Noel Gordon <noel@chromium.org>
Commit-Queue: Sam McNally <sammc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810150}

DEPS

@@ -896,7 +896,7 @@ deps = {
 
   # For Linux and Chromium OS.
   'src/third_party/cros_system_api': {
-      'url': Var('chromium_git') + '/chromiumos/platform2/system_api.git' + '@' + '9ae272cf722aed2eb5e237f9422f1b228c59d859',
+      'url': Var('chromium_git') + '/chromiumos/platform2/system_api.git' + '@' + '77b1345ec0ebb8e6fdf559dccaf0c64b1a4b7c24',
       'condition': 'checkout_linux',
   },