Merge cherrypicks of ['googleplex-android-review.googlesource.com/29050559', 'googleplex-android-review.googlesource.com/29050560'] into security-aosp-udc-release.

Change-Id: Idd15023694b2433953e7168f46f67f484f6999f8
tree: 1a6761fd2154f4540562158406b7f8763164a24c
  1. client-libs/
  2. common/
  3. .gitignore
  4. OWNERS
  5. PREUPLOAD.cfg
  6. TEST_MAPPING