Add Android S preview system images to android-sdk-packager.

Since Android S preview is available for public (aka in sdkmanager),
add the system images so that users can use them for emulator.

Bug: 1221261
Change-Id: I719a602d96a57f85bcdc11e5608aa2f95c4b9494
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2971103
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Haiyang Pan <hypan@google.com>
Cr-Commit-Position: refs/heads/master@{#893553}
NOKEYCHECK=True
GitOrigin-RevId: f74a93e1567af5efae46b21d5e1479b8e05f1910

cipd/system_images/android-S/google_apis/x86_64.yaml

diff --git a/cipd/system_images/android-S/google_apis/x86_64.yaml b/cipd/system_images/android-S/google_apis/x86_64.yaml
new file mode 100644
index 0000000..0adf746
--- /dev/null
+++ b/cipd/system_images/android-S/google_apis/x86_64.yaml
@@ -0,0 +1,9 @@
+# Copyright 2020 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.
+
+package: chromium/third_party/android_sdk/public/system-images/android-s/google_apis/x86_64
+description: system_images;android-S;google_apis;x86_64
+root: ../../../../public/
+data:
+  - dir: system-images/android-S/google_apis/x86_64

cipd/system_images/android-S/google_apis_playstore/x86_64.yaml

diff --git a/cipd/system_images/android-S/google_apis_playstore/x86_64.yaml b/cipd/system_images/android-S/google_apis_playstore/x86_64.yaml
new file mode 100644
index 0000000..53ea897
--- /dev/null
+++ b/cipd/system_images/android-S/google_apis_playstore/x86_64.yaml
@@ -0,0 +1,9 @@
+# Copyright 2020 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.
+
+package: chromium/third_party/android_sdk/public/system-images/android-s/google_apis_playstore/x86_64
+description: system_images;android-S;google_apis_playstore;x86_64
+root: ../../../../public/
+data:
+  - dir: system-images/android-S/google_apis_playstore/x86_64