DO NOT MERGE - Merge pi-platform-release (PPRL.190505.001) into stage-aosp-master

Bug: 132622481
Change-Id: I4827bec08e2a14687627fd6ef9c40e3b86d4c7ec
tree: ea66a09a53ae99e74885ad7bfde4dfccb02ca829
  1. build/
  2. common/
  3. tools/
  4. OWNERS
  5. PREUPLOAD.cfg
  6. test_defs.sh