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

build/android/pylib/remote/device/dummy/dummy.gyp

Index: build/android/pylib/remote/device/dummy/dummy.gyp
diff --git a/build/android/pylib/remote/device/dummy/dummy.gyp b/build/android/pylib/remote/device/dummy/dummy.gyp
new file mode 100644
index 0000000000000000000000000000000000000000..b003edcd86950d84562dfe457c2b57f128bbe5f6
--- /dev/null
+++ b/build/android/pylib/remote/device/dummy/dummy.gyp
@@ -0,0 +1,25 @@
+# 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.
+
+# Running gtests on a remote device via am instrument requires both an "app"
+# APK and a "test" APK with different package names. Our gtests only use one
+# APK, so we build a dummy APK to upload as the app.
+
+{
+  'targets': [
+    {
+      # GN: //build/android/pylib/remote/device/dummy:remote_device_dummy_apk
+      'target_name': 'remote_device_dummy_apk',
+      'type': 'none',
+      'variables': {
+        'apk_name': 'remote_device_dummy',
+        'java_in_dir': '.',
+        'android_manifest_path': '../../../../../../build/android/AndroidManifest.xml',
+      },
+      'includes': [
+        '../../../../../../build/java_apk.gypi',
+      ]
+    },
+  ]
+}