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

build/android/pylib/device/commands/BUILD.gn

Index: build/android/pylib/device/commands/BUILD.gn
diff --git a/build/android/pylib/device/commands/BUILD.gn b/build/android/pylib/device/commands/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..66e1010142a45b69ec0f0238100d7d45433d2025
--- /dev/null
+++ b/build/android/pylib/device/commands/BUILD.gn
@@ -0,0 +1,17 @@
+# 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.
+
+import("//build/config/android/rules.gni")
+
+group("commands") {
+  datadeps = [
+    ":chromium_commands",
+  ]
+}
+
+# GYP: //build/android/pylib/device/commands/commands.gyp:chromium_commands
+android_library("chromium_commands") {
+  java_files = [ "java/src/org/chromium/android/commands/unzip/Unzip.java" ]
+  dex_path = "$root_build_dir/lib.java/chromium_commands.dex.jar"
+}