[Android] Remove android_commands uses from build/android/.

build/android/pylib/device/device_filter.py

Index: build/android/pylib/device/device_filter.py
diff --git a/build/android/pylib/device/device_filter.py b/build/android/pylib/device/device_filter.py
new file mode 100644
index 0000000000000000000000000000000000000000..8e54b2597635d8762fb9a52dcbf3ade0814a9734
--- /dev/null
+++ b/build/android/pylib/device/device_filter.py
@@ -0,0 +1,53 @@
+# Copyright 2015 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.
+
+from pylib.device import device_blacklist
+from pylib.device import device_errors
+
+
+def DefaultFilters():
+  """Returns a list of the most commonly-used device filters.
+
+  These filters match devices that:
+    - are in a "device" state (as opposed to, e.g., "unauthorized" or
+      "emulator")
+    - are not blacklisted.
+
+  Returns:
+    A list of the most commonly-used device filters.
+  """
+  return [DeviceFilter, BlacklistFilter()]
+
+
+def BlacklistFilter():
+  """Returns a filter that matches devices that are not blacklisted.
+
+  Note that this function is not the filter. It creates one when called using
+  the blacklist at that time and returns that.
+
+  Returns:
+    A filter function that matches devices that are not blacklisted.
+  """
+  blacklist = set(device_blacklist.ReadBlacklist())
+  def f(adb):
+    return adb.GetDeviceSerial() not in blacklist
+
+  return f
+
+
+def DeviceFilter(adb):
+  """A filter that matches devices in a "device" state.
+
+  (Basically, this is adb get-state == "device")
+
+  Args:
+    adb: An instance of AdbWrapper.
+  Returns:
+    True if the device is in a "device" state.
+  """
+  try:
+    return adb.GetState() == 'device'
+  except device_errors.CommandFailedError:
+    return False
+