Merge Android R (rvc-dev-plus-aosp-without-vendor@6692709)

Bug: 166295507
Merged-In: I3a6d30448b2248807a5edf579f72bb6ed885b75e
Change-Id: I4e01fbf5d6fd342573625b6e3ad0c2a387432920
tree: 99a6f20963d7d89d8fd066d42841932fd0a0f7e9
  1. .gitignore
  2. OWNERS
  3. PREUPLOAD.cfg
  4. library/
  5. tools/