Add a snapshot of flutter/engine/src/build to our sdk

build/android/pylib/local/device/local_device_environment.py

Index: build/android/pylib/local/device/local_device_environment.py
diff --git a/build/android/pylib/local/device/local_device_environment.py b/build/android/pylib/local/device/local_device_environment.py
new file mode 100644
index 0000000000000000000000000000000000000000..04f9ab7d2fead494c5d90759e30ae90b048fc0e8
--- /dev/null
+++ b/build/android/pylib/local/device/local_device_environment.py
@@ -0,0 +1,54 @@
+# 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.
+
+from pylib.base import environment
+from pylib.device import adb_wrapper
+from pylib.device import device_errors
+from pylib.device import device_utils
+from pylib.utils import parallelizer
+
+
+class LocalDeviceEnvironment(environment.Environment):
+
+  def __init__(self, args, _error_func):
+    super(LocalDeviceEnvironment, self).__init__()
+    self._device_serial = args.test_device
+    self._devices = []
+    self._max_tries = 1 + args.num_retries
+    self._tool_name = args.tool
+
+  #override
+  def SetUp(self):
+    available_devices = device_utils.DeviceUtils.HealthyDevices()
+    if not available_devices:
+      raise device_errors.NoDevicesError
+    if self._device_serial:
+      self._devices = [d for d in available_devices
+                       if d.adb.GetDeviceSerial() == self._device_serial]
+      if not self._devices:
+        raise device_errors.DeviceUnreachableError(
+            'Could not find device %r' % self._device_serial)
+    else:
+      self._devices = available_devices
+
+  @property
+  def devices(self):
+    return self._devices
+
+  @property
+  def parallel_devices(self):
+    return parallelizer.SyncParallelizer(self._devices)
+
+  @property
+  def max_tries(self):
+    return self._max_tries
+
+  @property
+  def tool(self):
+    return self._tool_name
+
+  #override
+  def TearDown(self):
+    pass
+