Merge changes from topic 'hidl_device_manager'

* changes:
  Wi-Fi HAL Device Manager: implement available for request logic
  Wi-Fi HAL device manager: implement coordination logic
  Wi-Fi HAL device manager: add interface API
  Wi-Fi HAL device manager: baseline for init/start/stop
tree: de398685707dfa242062bc4059da05cea406433d
  1. libwifi_hal/
  2. libwifi_system/
  3. service/
  4. tests/
  5. PREUPLOAD.cfg