[Android] Convert to DeviceUtils versions of IsOnline, HasRoot, and EnableRoot.

build/android/pylib/utils/test_environment.py

Index: build/android/pylib/utils/test_environment.py
diff --git a/build/android/pylib/utils/test_environment.py b/build/android/pylib/utils/test_environment.py
index 145e07c85efa4a4674f2b3acf23972cb15f628c1..c61547201fd0cda6c717815401c4347f3d14cf95 100644
--- a/build/android/pylib/utils/test_environment.py
+++ b/build/android/pylib/utils/test_environment.py
@@ -7,8 +7,10 @@ import psutil
 import signal
 
 from pylib import android_commands
+from pylib.device import device_errors
 from pylib.device import device_utils
 
+
 def _KillWebServers():
   for s in [signal.SIGTERM, signal.SIGINT, signal.SIGQUIT, signal.SIGKILL]:
     signalled = []
@@ -41,6 +43,9 @@ def CleanupLeftoverProcesses():
       device_utils.RestartServer()
       did_restart_host_adb = True
     device.old_interface.RestartAdbdOnDevice()
-    device.old_interface.EnableAdbRoot()
+    try:
+      device.EnableRoot()
+    except device_errors.CommandFailedError:
+      pass
     device.old_interface.WaitForDevicePm()