DO NOT MERGE - Merge Android 10 into master

Bug: 139893257
Change-Id: I38429ee13989d447b1350d9f098d22786c2e9447
tree: d4d0f1ccfa3d6b82ef0a0be0a353328a3001714d
  1. library/
  2. tools/
  3. .gitignore
  4. OWNERS
  5. PREUPLOAD.cfg