Execute scripts based on the publication of data or a signal from system monitor

This CL contains CarTelemetryService-internal implementation and
threading model. We will move all cartelemetry operation on the same
thread.

The following changes are included:
(1) use a priority number instead of enabling a set of publishers
(2) a priority queue of ScriptExecutionTask (containing a reference
to a subscriber and data) is created. When a certain event happens,
the task will be scheduled and the pq gets polled.
(3) event driven task scheduling using a handler
(4) move the add and remove metrics config logic to handler thread

Bug: 190862594
Test: m CarService
Test: atest CarServiceUnitTest:DataBrokerUnitTest

Change-Id: I45e7d9768370f7ce803248a254713128bfd3f51d
5 files changed
tree: 925e6df96d65699f2d4e9d2e045183bb981bdba0
  1. car-admin-ui-lib/
  2. car-internal-lib/
  3. car-lib/
  4. car-maps-placeholder/
  5. car-systemtest-lib/
  6. car-test-lib/
  7. car-usb-handler/
  8. car_product/
  9. cpp/
  10. data/
  11. experimental/
  12. FrameworkPackageStubs/
  13. obd2-lib/
  14. packages/
  15. procfs-inspector/
  16. service/
  17. tests/
  18. tools/
  19. user/
  20. vehicle-hal-support-lib/
  21. .clang-format
  22. .gitignore
  23. Android.mk
  24. CleanSpec.mk
  25. CPPLINT.cfg
  26. OWNERS
  27. PREUPLOAD.cfg
  28. README.md
  29. TEST_MAPPING
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.