Merge remote-tracking branch 'cos/cos-sdk' into master

BUG=b/277779682
TEST=presubmit
RELEASE_NOTE=None

Change-Id: I924152e1e62da1c144ef0c18e19832e05e9e2f91
tree: d3d543edc4b0f1377162de7d8ca782192495898b
  1. acct-group/
  2. acct-user/
  3. eclass/
  4. metadata/
  5. profiles/
  6. OWNERS
  7. OWNERS.security
  8. PRESUBMIT.cfg
  9. README.md
README.md

CrOS eclass overlay

This eclass overlay is used for 2 purposes: