Add default code reviewers into OWNERS
am: 99e53b4c1c

Change-Id: I5a6eed9aff06c9b79d05810df40c4489f49e559d
tree: ede4203f0bac5572822d57acd6e295a2b3ae15f8
  1. bootctrl/
  2. libhwcomposer/
  3. OWNERS