Add a collector for /proc/stats and integrate it with IoPerfCollection.

- /proc/stats collector will be invoked by IoPerfCollection module on
each collection.
- Added unit tests to test the parsing and processing logics using
temporary stats file.
- Added unit test to parse and process /proc/stat from device.

Bug: 148486340, 130382110
Test: Tested with unit tests.
Change-Id: Iabb3c344e5e2a318f2ec49364d90bdf10f056f2d
7 files changed
tree: 1b6e8331ad4fc9c7d0775dd63bcacc5c800cbc5e
  1. car-bugreportd/
  2. car-default-input-service/
  3. car-lib/
  4. car-maps-placeholder/
  5. car-systemtest-lib/
  6. car-test-lib/
  7. car-usb-handler/
  8. car_product/
  9. computepipe/
  10. EncryptionRunner/
  11. evs/
  12. experimental/
  13. FrameworkPackageStubs/
  14. obd2-lib/
  15. procfs-inspector/
  16. service/
  17. tests/
  18. tools/
  19. user/
  20. vehicle-hal-support-lib/
  21. watchdog/
  22. .clang-format
  23. .gitignore
  24. Android.mk
  25. CleanSpec.mk
  26. CPPLINT.cfg
  27. OWNERS
  28. PREUPLOAD.cfg
  29. README.md
README.md

Native (C++) code format is required to be compatible with .clang-format file. Run

git clang-format --style=file --extension='h,cpp,cc' HEAD~

Note that clang-format is not desirable for Android java files. Therefore the command line above is limited to specific extensions.