Merge mpr-2021-09-05

Change-Id: Ifc7fb9c2e43ee0e3e8c0eb953129ef55d7ff5ced
tree: 1a8fa2d68feac248470388459167ef2e15b32103
  1. nn/
  2. .clang-format
  3. CleanSpec.mk
  4. CPPLINT.cfg
  5. OWNERS
  6. PREUPLOAD.cfg