[Edgecore][device][platform] Sync PR-13111 with is_host() function.

Signed-off-by: michael_shih <michael_shih@edge-core.com>

platform/broadcom/sonic-platform-modules-accton/as9736-64d/sonic_platform/helper.py

@@ -7,9 +7,10 @@
 from sonic_py_common import logger
 from threading import Lock
 from typing import cast
+from sonic_py_common.general import getstatusoutput_noshell
 from sonic_py_common.general import getstatusoutput_noshell_pipe
 
-HOST_CHK_CMD = "which systemctl > /dev/null 2>&1"
+HOST_CHK_CMD = ["docker"]
 EMPTY_STRING = ""
 
 
@@ -19,7 +20,11 @@ def __init__(self):
         (self.platform, self.hwsku) = device_info.get_platform_and_hwsku()
 
     def is_host(self):
-        return os.system(HOST_CHK_CMD) == 0
+        try:
+            status, output = getstatusoutput_noshell(HOST_CHK_CMD)
+            return status == 0
+        except Exception:
+            return False
 
     def pci_get_value(self, resource, offset):
         status = True