Revert "Update D8 and R8 to 2.1.28-dev"

This reverts commit
3f080c30a919540200726608f4f99ebbad1be01c
92a15eec417082e217ecad4a9bea88502286258a
8362bac176f3bde71d4f09dfdc3e5a612aeea7ff

Reason for revert: aosp phone message app crashes: b/158429654

Change-Id: If2f6db566bdbff27e0934d20dd94e3c127e446be
2 files changed