[Android] Remove more references to and uses of AndroidCommands.

tools/telemetry/telemetry/unittest_util/system_stub.py

Index: tools/telemetry/telemetry/unittest_util/system_stub.py
diff --git a/tools/telemetry/telemetry/unittest_util/system_stub.py b/tools/telemetry/telemetry/unittest_util/system_stub.py
index 72fca71c99707b35568c5ef2dd3125bb58c0dda1..9ffd53a82450b92721b7ed1011be8f1b9f54c03b 100644
--- a/tools/telemetry/telemetry/unittest_util/system_stub.py
+++ b/tools/telemetry/telemetry/unittest_util/system_stub.py
@@ -60,15 +60,6 @@ class Override(object):
     self._overrides = {}
 
 
-class AndroidCommands(object):
-
-  def __init__(self):
-    self.can_access_protected_file_contents = False
-
-  def CanAccessProtectedFileContents(self):
-    return self.can_access_protected_file_contents
-
-
 class AdbDevice(object):
 
   def __init__(self):
@@ -77,7 +68,12 @@ class AdbDevice(object):
     self.system_properties = {}
     if self.system_properties.get('ro.product.cpu.abi') == None:
       self.system_properties['ro.product.cpu.abi'] = 'armeabi-v7a'
-    self.old_interface = AndroidCommands()
+
+  def HasRoot(self):
+    return self.has_root
+
+  def NeedsSU(self):
+    return self.needs_su
 
   def RunShellCommand(self, args, **_kwargs):
     if isinstance(args, basestring):