Merge mainline-release 6664920 to stage-aosp-master - DO NOT MERGE

Merged-In: I51828886b476522a8d9d2c726ee7785465d31fd2
Change-Id: If44be2f871dfe2a2a857720624b00a0605d0b3d4
tree: 82eb9e1ffe6e3b0c478f40838544d2937f1dbe40
  1. nn/
  2. .clang-format
  3. CleanSpec.mk
  4. CPPLINT.cfg
  5. OWNERS
  6. PREUPLOAD.cfg