Add new Android libraries to dependencies

This was missed in the CL adding them:
(https://r8-review.googlesource.com/c/r8/+/32060/).

Change-Id: If2d75ae19043e7047fe1bf4537e16e20d400c67b
diff --git a/build.gradle b/build.gradle
index 5631d94..9e84b01 100644
--- a/build.gradle
+++ b/build.gradle
@@ -276,6 +276,8 @@
                 "android_jar/lib-v24",
                 "android_jar/lib-v25",
                 "android_jar/lib-v26",
+                "android_jar/lib-v27",
+                "android_jar/lib-v28",
                 "core-lambda-stubs",
                 "dart-sdk",
                 "ddmlib",