Updated D8 version and introduced R8.

Bug: 872904
Change-Id: Ida80736a33c98bb9e4faea1864f921d7d0d58c81
Reviewed-on: https://chromium-review.googlesource.com/c/1302699
Commit-Queue: Sam Maier <smaier@chromium.org>
Reviewed-by: agrieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#603204}

DEPS

@@ -1066,7 +1066,7 @@ deps = {
       'packages': [
           {
               'package': 'chromium/third_party/r8',
-              'version': 'version:1.2.48',
+              'version': 'version:1.4.4-cr0',
           },
       ],
       'condition': 'checkout_android',

third_party/r8/README.chromium

 Name: R8
 URL: https://r8.googlesource.com/r8
-Version: 1.2.48
+Revision: 97efc6605ceee3e7c12238ae48718d63e5906b4a
+Version: 1.4.4
 License: BSD 3-Clause
 License File: NOT_SHIPPED
 Security Critical: no
 
 Description:
-D8 is a dexer that converts java byte code to dex code.
-It is contained in the R8 repo.
+D8 is a dexer that converts java byte code to dex code. R8 is a proguard-like
+optimizer that also has the ability to dex. D8 is found within R8's repo.
 
 Local Modifications:
 None

third_party/r8/cipd.yaml

 package: chromium/third_party/r8
 description: >
   D8 is a dexer that converts java byte code to dex code (part of the R8 repo).
+  R8 is a proguard-like optimizer that also has the option to dex.
 data:
   - file: lib/d8.jar
+  - file: lib/r8.jar