Merge changes I5d55b287,I3d39c193,If60282ad,I132fd395,I09a7f6f5

* changes:
  WifiLog: add CheckReturnValue annotation
  logging: add convenience APIs for literal messages
  WifiDiagnostics: migrate to chained logging API
  logging: add chained logging API
  WifiDiagnostics: remove getAllRingBufferData()
tree: dbf3219059a55ea364c7db04317375103c729876
  1. libwifi_hal/
  2. libwifi_system/
  3. service/
  4. tests/