Merge changes from topic "bg_app_restrictions"

* changes:
  Expose the bg restriction exemption list as an internal API.
  Add an action button to the notification for bg battery abusive apps
  Exempt certain app behaviors for their background battery usage
  Add tracking on abusive broadcast and service binding requests
  Add exemption cases for app background restrictions
  Monitor long-running foreground services
  Post notification on abusive background current drain
  Allow limited alarms/jobs when background restricted
  Cap the LRU position of broadcast receivers in bg restricted apps
  Add a tracker on background current drains for each uid
  Add background restriction levels definition and its controller