Merge changes from topic "add-thread-to-udc-mainline-prod" into udc-mainline-prod

* changes:
  [Thread] add "owner: google" for Thread HAL
  remove the Thread Network HAL from the stage folder
  change the Thread Network HAL api from 'reset' to 'hardwareReset'
  fix the Thread Network fuzz testing error
  add Spinel SPI interface support
  add fuzz test and fix the Thread network HAL compile errors
  Add Thread network HAL