Rolling R8 1.4.4 -> 1.3.40

We are rolling to 1.3.40 for stability. We plan to roll to a newer
version once there are no CQ blocking bugs.

Bug: 872904
Change-Id: If0087a324f1c19ccd697a7071069c41d6e84ee4b
Reviewed-on: https://chromium-review.googlesource.com/c/1352523
Commit-Queue: Sam Maier <smaier@chromium.org>
Reviewed-by: agrieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611958}

DEPS

@@ -1081,7 +1081,7 @@ deps = {
       'packages': [
           {
               'package': 'chromium/third_party/r8',
-              'version': 'version:1.4.4-cr0',
+              'version': 'uM1IGlYVeBYwmhwRCSMVqRvmu4YFlL7M2yLwZ1DWUvAC',
           },
       ],
       'condition': 'checkout_android',

third_party/r8/README.chromium

 Name: R8
 URL: https://r8.googlesource.com/r8
 Revision: 97efc6605ceee3e7c12238ae48718d63e5906b4a
-Version: 1.4.4
+Version: 1.3.40
 License: BSD 3-Clause
 License File: NOT_SHIPPED
 Security Critical: no

third_party/r8/cipd.yaml

+# Copyright 2018 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.
+
+# Example for updating r8 in the current dir:
+#   Run:
+#     cd <r8 code directory>
+#     tools/gradle.py d8 r8 # Building R8
+#     cd -
+#
+#     cipd auth-login
+#     rm lib/r8.jar lib/d8.jar
+#     cp <r8 code directory>/build/libs/r8.jar lib/r8.jar
+#     cp <r8 code directory>/build/libs/d8.jar lib/d8.jar
+#     java -jar lib/r8.jar --version
+#     cipd create --pkg-def cipd.yaml # Make note of the instance ID
+#   Manually update:
+#     README.chromium (version number)
+#     //DEPS (instance ID output by cipd create)
+
 package: chromium/third_party/r8
 description: >
   D8 is a dexer that converts java byte code to dex code (part of the R8 repo).