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

build/android/pylib/utils/host_path_finder.py

Index: build/android/pylib/utils/host_path_finder.py
diff --git a/build/android/pylib/utils/host_path_finder.py b/build/android/pylib/utils/host_path_finder.py
new file mode 100644
index 0000000000000000000000000000000000000000..389ac4371bb239d9695f221a052eb50a07179c0a
--- /dev/null
+++ b/build/android/pylib/utils/host_path_finder.py
@@ -0,0 +1,22 @@
+# Copyright 2013 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.
+
+import os
+
+from pylib import constants
+
+
+def GetMostRecentHostPath(file_name):
+  """Returns the most recent existing full path for the given file name.
+
+  Returns: An empty string if no path could be found.
+  """
+  out_dir = os.path.join(
+      constants.DIR_SOURCE_ROOT, os.environ.get('CHROMIUM_OUT_DIR', 'out'))
+  candidate_paths = [os.path.join(out_dir, build_type, file_name)
+                     for build_type in ['Debug', 'Release']]
+  candidate_paths = filter(os.path.exists, candidate_paths)
+  candidate_paths = sorted(candidate_paths, key=os.path.getmtime, reverse=True)
+  candidate_paths.append('')
+  return candidate_paths[0]