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

Bug: 132622481
Change-Id: I91dbf16a1e49e138aa2fbc4a7e54fe8b0fc660a6
tree: 1a9bf1cd7918f7a6faae4268e86afa4b90745a16
  1. library/
  2. navigationbar/
  3. tools/
  4. .gitignore
  5. OWNERS
  6. PREUPLOAD.cfg