Merge changes from topic "nn-shared-handle"

* changes:
  Replace native_handle with unique_fd
  Split Utils into LegacyUtils and LegacyHalUtils
  Copy Utils to LegacyUtils and LegacyHalUtils
  Use sensible Capabilities in test drivers
tree: 393400e347cac5b974dddc0b93060aef51e2317e
  1. nn/
  2. .clang-format
  3. CleanSpec.mk
  4. CPPLINT.cfg
  5. OWNERS
  6. PREUPLOAD.cfg