DO NOT MERGE - Merge Android 10 into master

Bug: 139893257
Change-Id: I2bdaf1520b9e5ad8a4a8ed2f5b0bf3d8c33f083f
tree: 3a5b26e145f6189bd77e7bf27090cad9404ff208
  1. .gitignore
  2. OWNERS
  3. PREUPLOAD.cfg
  4. __init__.py
  5. configs/
  6. gae/
  7. proto/
  8. script/