Mark Android R (rvc-dev-plus-aosp-without-vendor@6692709) as merged

Bug: 166295507
Merged-In: I06faf59c52240c3fd2712e5498418f43dec6a25b
Change-Id: I9509a34a74cc200e3cf08d46efb930fdef998bd8
tree: bcf3c9ae6ea7569e1c2c6ebed9d8de4c8f93470e
  1. Android.bp
  2. Android.mk
  3. CleanSpec.mk
  4. NOTICE
  5. pylintrc
  6. r21/
  7. update.py