Merge cherrypicks of [4691303, 4690277, 4694738, 4689486, 4694439, 4694440, 4689487] into pi-dr1-release

Change-Id: I5f3933c8d3706eff3e24061cf6a133a2bbfe9505
tree: 7b2cfe43775cf9f41540eb8b0fa327f8e91e2668
  1. OWNERS
  2. crosshatch-sepolicy.mk
  3. private/
  4. public/
  5. vendor/