Revert "Update D8 and R8 to 2.1.2-dev"

This reverts commit f113b61d825d12cd1863b1afcc0f064105d3ac93.

Reason for revert: b/148461139

Change-Id: I0bc9d5ae4560e965b4de7deb6b22b4a5bf489995
2 files changed