[Android] Switch KillAll, StartActivity, and BroadcastIntent to DeviceUtils.

build/android/pylib/device/device_errors.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """
 Exception classes raised by AdbWrapper and DeviceUtils.
 """
 
 class BaseError(Exception):
   """Base exception for all device and command errors."""
   pass
 
 
 class CommandFailedError(BaseError):
   """Exception for command failures."""
 
+  def __init__(self, msg, device=None):
+    super(CommandFailedError, self).__init__(
+        '%s%s' % ('(device: %s) ' % device if device else '', msg))
+
+
+class AdbCommandFailedError(CommandFailedError):
+  """Exception for adb command failures."""
+
   def __init__(self, cmd, msg, device=None):
-    super(CommandFailedError, self).__init__(
-        (('device %s: ' % device) if device else '') +
-        'adb command \'%s\' failed with message: \'%s\'' % (' '.join(cmd), msg))
+    super(AdbCommandFailedError, self).__init__(
+        'adb command \'%s\' failed with message: \'%s\'' % (' '.join(cmd), msg),
+        device=device)
 
 
 class CommandTimeoutError(BaseError):
   """Exception for command timeouts."""
   pass
 
 
 class DeviceUnreachableError(BaseError):
   """Exception for device unreachable failures."""
   pass