[Android] Remove more uses of android_commands from build/android/pylib.

build/android/pylib/device/device_utils.py

Index: build/android/pylib/device/device_utils.py
diff --git a/build/android/pylib/device/device_utils.py b/build/android/pylib/device/device_utils.py
index 46aec6fc9df0eb7b94b89628457567a692299b81..95c951925c089a3192cbcfe9bac3481095d5520e 100644
--- a/build/android/pylib/device/device_utils.py
+++ b/build/android/pylib/device/device_utils.py
@@ -175,6 +175,29 @@ class DeviceUtils(object):
     assert hasattr(self, decorators.DEFAULT_TIMEOUT_ATTR)
     assert hasattr(self, decorators.DEFAULT_RETRIES_ATTR)
 
+  def __eq__(self, other):
+    """Checks whether |other| refers to the same device as |self|.
+
+    Args:
+      other: The object to compare to. This can be a basestring, an instance
+        of adb_wrapper.AdbWrapper, or an instance of DeviceUtils.
+    Returns:
+      Whether |other| refers to the same device as |self|.
+    """
+    return self.adb.GetDeviceSerial() == str(other)
+
+  def __lt__(self, other):
+    """Compares two instances of DeviceUtils.
+
+    This merely compares their serial numbers.
+
+    Args:
+      other: The instance of DeviceUtils to compare to.
+    Returns:
+      Whether |self| is less than |other|.
+    """
+    return self.adb.GetDeviceSerial() < other.adb.GetDeviceSerial()
+
   def __str__(self):
     """Returns the device serial."""
     return self.adb.GetDeviceSerial()